133 results about "Petroleum geology" patented technology

The invention discloses a preparation method of an artificial core in a petroleum geology research. The preparation method comprises the following steps: during the process of cementing quartz sand and epoxy resin through a cementing agent, introducing a nano porous material and a metal thin sheet, performing curing under pressure, soaking a core in acid or alkali or leaching the core to form slits, finally flushing the artificial core with distilled water, and drying. By the adding of polyethylene glycol and citric acid, the artificial core has high surface wettability, and the surface property is closer to natural core. According to the preparation method, the slits, micron-level pores and nano-level pores of the artificial core can be quantitatively controlled, so that the prepared artificial core is extremely high in similarity with the natural core and can meet simulation and test on such physical properties as sound wave, transfusion and conductivity of the core in the petroleum geology research, thus providing an experimental support for oil-gas exploration development.

The invention provides a mineral standard sample used for nanometer CT, and a preparation method and an application thereof. The preparation method of the mineral standard sample comprises the following steps: selecting standard mineral particles according to the mineral composition of a rock to be measured; respectively processing at least one of the selected standard mineral particles to form mineral sample discs; and welding one of the mineral sample discs to a pedestal, and stacking and welding all the mineral sample discs to form the mineral standard sample. When the mineral standard sample is used in mineral analysis, mineral identification is carried out by using the gray scale information of the standard mineral sample and a rock sample to make unknown mineral particles in the rock sample identified and calibrated, so the three dimensional distribution, the volume proportions and the mineral particle dimension distribution of corresponding mineral components in the rock sample are obtained. The method effectively fills up the gap in preparation methods of like standard samples, and meets urgent demands of microscopic three dimensional mineral analysis in the petroleum geology field.

The invention belongs to the field of petroleum geology and particularly relates to a manufacturing method of a shale rock lamina. The manufacturing method of the shale rock lamina sequentially comprises the following steps: fixing a loose shale rock sample with glue; slicing for the first time; smoothing and polishing for the first time; sticking a shale sample; and slicing for the second time, and smoothing and polishing for the second time. By virtue of the shale rock lamina prepared by the method, the post-period pollution including damages of a shale microstructure, component loss, fluorescence interference and the like, caused by a slicing, grinding and polishing process and a glue fixing process, can be avoided, so that the aim of keeping original geological information in the shale sample is realized. The manufacturing method of the shale rock lamina has the advantages that the original information of the sample is protected, the amount of needed samples is small, the lamina manufacturing period is short and the like; and the manufacturing method lays a powerful foundation for subsequent microscopic petrography and microscopic fluorescence observation of the shale rock, and accuracy of all experiment test analysis.

The invention discloses a facies-controlled porosity inversion method based on Bayesian classification and belongs to the technical field of petroleum geology exploration. The facies-controlled porosity inversion method includes the following steps: 1. perform cross analysis on a well logging curve of rock porosity and the well logging curve of a plurality of rock elastic parameters which is acquired through experiment tests to acquire the rock elastic parameter data sensitive to the rock porosity; 2. acquiring the screened porosity and the screened elastic parameter data; 3. establishing a borehole-seism initial model and also acquiring the prior probability distribution of the screened porosity; 4. acquiring resample porosity and also acquiring fitting screening elastic parameter data and fitting resampling elastic parameter data; 5. acquiring resampling errors; 6. acquiring reconstructed elastic parameter data; 7. acquiring the prior sample series and conducting Bayesian classification to acquire the prior probability distribution and posterior probability distribution; and 8. conducting Bayesian inversion to transform a known elastic parameter data volume to a porosity data volume.

The invention discloses a method for evaluating a reservoir stratum with a nuclear magnetic resonance logging interpretation chart, relating to the technical field of evaluation of petroleum geology exploration geological logging interpretation. The method comprises the steps of: selecting two parameters such as an oil saturation So and a movable fluid saturation BVM; obtaining a parameter M1 with the formulation M1=BVM*So; building Phi-M1 interpretation chart; computing the movable oil saturation Smo parameter with the formulation Smo=BVM-Smw; obtaining a parameter M2 with the formulation M2=Smo*phi; building So-M2 interpretation chart; and visually evaluating the classification of the reservoir stratum liquid with the two interpretation charts. The method can solve the problem for evaluating whether the reservoir stratum can generate liquid and the character of the fluid, can solve the problem for evaluating the oil content of the reservoir stratum and the oil capacity, removes uncertain factors of interpretation parameters caused by factors such as block, stratum position and oil content character, and the like, and has universal applicability in oil-containing bed series of clastic rocks.

The invention discloses a 2.5-times three-dimensional seismic exploration method of a complex geological target applied to the petroleum geology exploration. The 2.5-times three-dimensional seismic exploration method comprises the following steps of: calculating coverage times needed by the 2.5-times three-dimension according to the relationship of signal-to-noise ratios and coverage times of stack section data and original single-shot data; treating and analyzing limited shot-geophone distance with utilization of two-dimensional test wire data with long shot-geophone distances and high coverage, and preferably choosing proper maximum shot-geophone distance; determining key parameters of an observation system according to the analytic conclusions; establishing an uniform coordinate grids by adopting an uniform origin of coordinates, and realizing fusion of time-domain three-dimensional seismic data; and realizing high-precision imaging of the complex target by establishment of a regular and high-precise velocity field of the three-dimensional seismic data and migration treatment of three-dimensional prestack time. The 2.5-times three-dimensional seismic exploration method of the complex geological target has the following effects: through the fusion of the three-dimensional seismic data, the coverage times is increased and the signal-to-noise ratio of the data is improved; the imaging precision of the data is improved by utilizing the prestack time migration technology, and the fine description of the complex geological target is realized.

The invention discloses a control optimizing method and device of horizontal well drilling friction and relates to the field of rock-soil or petroleum geology drilling. The control optimizing method of horizontal well drilling friction comprises the following steps that drilling parameters are obtained; according to the drilling parameters of drilling work, a plurality of sets of data samples are obtained through selection; drill column working states corresponding to the data samples are recognized; based on the drilling parameters, the data samples and the drill column working states corresponding to the data samples, the practical friction coefficient of the data samples is obtained; correlation analysis is conducted on the data samples and the practical friction coefficient of the data samples, and parameters, meeting preset requirements, in the drilling parameters are obtained; and the parameters, meeting the preset requirements, in the drilling parameters are adjusted according to preset rules. By the adoption of the control optimizing method and device, the practical friction coefficient can be optimized, and accordingly the real-time drilling efficiency is improved.

The invention provides a quantitative evaluation method of cracking of disperse liquid hydrocarbon into gas. The evaluation method comprises the steps of selecting various hydrocarbon source rock of a major end member, determining a distribution ratio and basic amount of in-source disperse liquid hydrocarbon and out-source disperse liquid hydrocarbon in the various hydrocarbon source rock based on an oil drainage rate study, determining a major enrichment distribution area of out-source disperse liquid hydrocarbon via statistics of thermogenic pitch and fluorescence samples, analyzing a thermodynamic condition and a conversion rate of cracking of disperse liquid hydrocarbon into the gas, determining an effect of temperature, pressure and an inorganic mineral medium of the cracked gas on a conversion effect and an opportunity, carrying out oil gas system analysis on a particular study area, determining a basic petroleum geology condition and a main gas generation period of the cracking of liquid hydrocarbon into the gas, dividing disperse liquid hydrocarbon into in-source disperse liquid hydrocarbon and out-source disperse liquid hydrocarbon, and quantitatively calculating gas amount cracked by disperse liquid hydrocarbon. The method can quantity the gas cracked by disperse liquid hydrocarbon in the ancient hydrocarbon source rock in a marine superimposed basin.

The invention discloses an experimental device and method for simulating fracture development in a high-temperature pyrolysis process of a source rock, and relates to the fields of rock mechanics andpetroleum geology. The experimental device comprises: a hot pressure reaction device, a heating device, a pressurizing device, a fluid pressure control and product collection unit and an acoustic emission testing device, wherein the heating device comprises a box body, a heating element arranged in the box body and a thermocouple unit; the box body is used for loading the hot pressure reaction device; the pressurizing device is used for providing corresponding pressure to a lower pressure head, a lower end cover and a confining pressure head; the fluid pressure control and product collection unit comprises a fluid pressure controller that can be communicated with a second flow channel of theanan upper pressure head, a vacuum pump that can be communicated with the second flow channel of theupper pressure head, and a water pump communicated with a first flow channel of the lower pressure head; the acoustic emission testing device comprises a waveguide rod penetrating in a reaction kettle body and an acoustic emission testing probe connected with the waveguide rod. The device and method disclosed by the invention can simulate fracture development in thea high-temperature pyrolysis process of the source rock in a geological environment coupling a triaxial stress field withand a blowhole fluid pressure.

The invention relates to a power and signal transmission drill stem for exploration and drilling of petroleum geology. The power and signal transmission drill stem can realize the real-time bidirectional transmission of signals and can transmit strong electricity to shaft bottoms. The technical scheme of the power and signal transmission drill stem is as follows: the transmission drill stem comprises a special connector of the drill stem, an electric connector and a power and signal transmission drill stem body, wherein the special connector of the drill stem comprises a special male connector of the drill stem and a special female connector of the drill stem; a male electrical connector is arranged at the special male connector of the drill stem, and a female electrical connector is arranged at the special female connector of the drill stem; the male electrical connector and the female electrical connector comprise conducting rings, insulation seal rings, metal baffle rings, connecting conductors, metal baffle ring sealing materials, insulation elastic bodies and locating pins; and an inner pipe, a body insulation material, a body transmission conductor and a drill stem body are arranged in the power and signal transmission drill stem body. The power and signal transmission drill stem has the characteristics of simple structure, low cost, high efficiency, long service life and the like and is used for wired real-time bidirectional high-rate data transmission of information and power transmission in the drilling.

The invention provides a carbonatite oil-gas exploration method and a carbonatite oil-gas exploration device. The carbonatite oil-gas exploration method comprises the steps of: acquiring evaluation parameters of oil and gas reservoirs at a plurality of sampling points in a work area; acquiring a fitting relation between a gas cut degree and the evaluation parameters of the oil and gas reservoirs in the work area according to the evaluation parameters of the oil and gas reservoirs; and predicting oil and gas reservoirs in the work area according to the fitting relation, and guiding oil-gas exploration. According to the carbonatite oil-gas exploration method and the carbonatite oil-gas exploration device, petroleum geology of the oil and gas reservoirs of various phase states in the work area is studied comprehensive, the evaluation parameters of the oil and gas reservoirs at the plurality of sampling points are obtained, and the fitting relation between the gas cut degree and the evaluation parameters of the oil and gas reservoirs in the work area is obtained through fitting, thereby solving the problems of inaccurate oil-gas prediction and low exploration efficiency because the influence of gas cut on oil and gas reservoirs cannot be analyzed quantitatively in the prior art, and achieving the purpose of quantitatively analyzing the influence of gas cut on oil and gas reservoirs.

The invention discloses a sandstone oil and gas carrier bed geophysics-geology-geochemistry detection method and a sandstone oil and gas carrier bed earth physical-geological-geochemistry detection device, wherein the method comprises the following steps that a buoyancy model is built according to the actual measured density differences of oil, gas and water of underground oil-gas reservoirs; through combining the rock core analysis and logging curves, a sandstone shale content, porosity, permeability and displacement pressure model is built; an oil and gas conveying sealing surface is determined according to displacement pressure curves; sandstone layer sections with the buoyancy greater than the displacement pressure are detected, and possible carrier beds are sieved; through combining test results on hydrocarbons by oil-gas geology and geochemistry, the effective sandstone carrier bed is determined. The method and the device provided by the invention have the advantages that through combining the borehole geophysics, geology and geochemistry theories and technology, according to the oil and gas accumulation dynamics principle, the effective detection on the sandstone carrier bed is realized, so the scientificity on the oil-gas reservoir petroleum geology study is improved.

The invention relates to a comprehensive evaluation method for single well petroleum geology. The method comprises the following steps: 1, source rock evaluation; 2, reservoir stratum evaluation; 3, overlying stratum evaluation; 4, entrapment evaluation; 5, oil gas source comparison. According to the comprehensive evaluation method for the single well oil gas geology, the sequence stratigraphy theory serves as guidance, systematic observation of rock debris and the core and sample analysis serve as the bases, physical geography materials such as logging are combined, system partitioned strata are compared with adjoining wells, target stratum series sedimentary facies markers, sedimentary facies types and characteristics, stratigraphic sequence characteristics and sedimentary cycles, structures and structural characteristics are researched, sedimentary facies, cored interval sedimentary microfacies and comprehensive logging interval sedimentary microfacies are partitioned, sedimentary environment analysis is conducted, a single well facies model and whole well sedimentary facies sections are established, the mutual relations between the sedimentary facies and a crude stratum, a reservoir stratum and an overlying stratum are defined, and outlining basis is provided for conducting single well oil gas geology basic element analysis.

The invention provides a core segmented sealing device and its application method and belongs to the field of petroleum geology. The device comprises a core storage cylinder and inflation sealing rings. The core storage cylinder has a cylindrical structure, one end of which is a sealed end and the other end of which is an open end. The open end is provided with a top cover. At least two pilot holes are arranged on the wall of the core storage cylinder. Each pilot hole contains two through-holes which are apart from each other 180 degrees on a circle. Axes of all through-holes are vertical to the axis of the core storage cylinder 1. The inner wall of the core storage cylinder is provided with at least two annular seal grooves. Each annular seal groove is corresponding to a pilot hole. Each pilot hole enables its corresponding annular seal groove to be communicated with the outside world. One of the inflation sealing rings is installed in each annular seal groove. By the use of the device, rapid and segmented sealed storage of cores is realized, gas dissipation under the atmospheric condition is minimized, and a foundation is laid for the next steps of analytical tests and research work.

The invention discloses a control method and device of drilling parameters and relates to the field of rock-soil or petroleum geology drilling. The control method of the drilling parameters comprises the following steps that the real-time drilling parameters are obtained; according to the drilling parameters in the drilling operation, a plurality of sets of data samples are obtained through selection; the state of drill column operation corresponding to the data samples is recognized, and the state type of a drill column corresponding to the data samples is obtained; based on the drilling parameters, the data samples and the state type of the drill column corresponding to the data samples, the drilling tool energy transfer index of the data samples is obtained; correlation analysis is conducted on the data samples and the drilling tool energy transfer index of the data samples, and parameters, meeting preset requirements, in the drilling parameters are obtained; and the parameters, meeting the preset requirements, in the drilling parameters are adjusted and controlled according to preset rules. By the adoption of the control method and device of the drilling parameters, the drilling tool energy transfer index can be optimized, and accordingly the real-time drilling efficiency is improved.

The invention is a method for fabricating rock gap casting sheet, which comprises: superposedly arranging two regular polygon copper papers printed with identical rock sample numbers between each two rock samples as spacing material; uniformly painting release agent between two regular polygon copper papers, and compacting the two copper papers. The testing sample is guaranteed to be labeled unique identification in the process of fabricating a plurality of rock sample castings, thereby guaranteeing one-to-one correspondence of sample numbers in the sample separating process, and greatly improving efficiency of fabricating castings. The method of the invention is additions and amendments to standard DZS200.35-94 <<Identification and statistical method for rock gas casting sheet >> of Petroleum Geology Marine Geology Board of Department of Geology and Mineral Resources and oil and gas industry standard SY / T6103-2004 <<Testing image analysis method for rock pore structure characteristics>>, and can be considered to be incorporated to new industry standard.

A device for measuring polarizability of rocks is applied to the field of measurement of rocks in petroleum geology and is used in the laboratories under normal temperature. The device is characterized in that the whole device is mainly composed of a core holder, a solution cycling system and a measurement panel, wherein the core holder is of clip structure; the solution cycling system is reasonable in structure; water nozzles of measuring chambers of the solution cycling system are provided with valves; the measuring system dispenses with external standard modules or reference modules while carrying out zero graduation; and the measuring process is controlled by the computer. The invention has the following effects: the invention provides a clip structured core holder which is quite convenient to assemble and disassemble for measuring the polarizability of rocks in the laboratories, the solution cycling system ensuring the measuring result of the polarizability of rocks to be slightly affected by external polarization potential and the device panel which is reasonable in structure and convenient to operate.

The embodiments of the invention provide a method and a device for cleaning petroleum geology software data. The method comprises the steps: acquiring a cleanup strategy file, wherein the cleanup strategy file comprises a plurality of cleanup tasks for different database users and the default execution time, corresponding user information and user information corresponding cleanup manner of each cleanup task; determining a cleanup task, of which the default execution time is current time, in the cleanup strategy file; executing the determined cleanup task in the related user information corresponding cleanup manner by using the related corresponding user information. The method and the device have the advantages that manual data cleanup can be avoided, the time and labor are saved, and the accidental deletion rate is lowered; meanwhile, the cleanup tasks can be executed in an automatic and timed manner, and data of the different database users can be subjected to different cleanup respectively according to user information, so that the different database users can clean respective data in an independent and targeted manner, and the improvement on data security is facilitated.

The invention discloses a simulation method and system of a preferential migration passage in a heterogeneous transport layer, and relates to the technical field of petroleum geology exploration. The preferential passage which leads to a trap in the transport layer in a reservoir forming process can be quickly calculated, but not a path with a maximum difference value is easily selected, and the most possible path under the current data condition is preferably selected. Compared with the mode, the method and the system have the advantages that a fluid potential and rill mark simulation-based effect is closer to the realistic condition from the point of view of implementation; the prediction accuracy is high; meanwhile, since the algorithm is easier, the calculation is quick.

The invention discloses a physical simulation experiment device and method for determining the buoyancy lower limit and power balance, and belongs to the field of petroleum geology. The physical simulation experiment technology is utilized for determining buoyancy lower limit change features and the power balance relation at the lower limit on the condition of tight sandstone reservoirs of petroliferous basins. The deep basin gas accumulation physical simulation experiment device simulates piston-type boosting of natural gas on the condition of the tight reservoirs. The sizes of a critical pore throat when buoyancy acts or not on the conditions of different water column weights and different charge pressures are simulated, and under the buoyancy lower limit, natural gas does not generate gas-water replacement and gathers to form deep basin gas accumulation. Experimental data are utilized for fitting of the relation between the diameter of the critical pore throat and the water column heights, a force balance relation among the expansive force of natural gas, capillary force and hydrostatic pressure on the critical condition is built, and a calculation mode of the radius of the critical pore throat is determined. The physical simulation experiment device and method deepen search on tight sandstone gas reservoir accumulation mechanisms, and provide an effective means for prediction of the entrapment range of tight sandstone gas reservoirs.

The invention discloses a method for quantitatively analyzing an ultra-deep gypsum salt rock and dolomite coupling mechanism. The method comprises the following steps of: (1) respectively acquiring geological background data, classic field geological outcrop profile measurement data, drilling and logging data and seismic data by taking a Sichuan basin carbonate rock reservoir as an object; (2) according to the data obtained in the step (1), determining the basic geological characteristics of dolomite by using sedimentology, petroleum geology theories and various geochemical test analysis, anddetermining the types of dolomite and petrology and distribution rules of various dolomites; and (3) according to the petrology and distribution rule of various dolomites, analyzing the form and formation mechanism of various dolomites and the quantitative relationship between the dolomites and gypsum salt rock, and finally determining the coupling relationship. By judging the source, the seepagedirection, the path and the like of dolomitic fluid, the coupling relation between the dolomitic fluid source and quantification of the bed series and gypsum salt rock is defined, and the method has important guiding significance for oil and gas exploration.

The invention discloses a raw material formula and production method of bentonite for well drilling. The mass percentage of raw materials is as follow: 92-96% of calcium-based soil, 2-5% of alkali powder, 0.5-1.5% of carboxymethylcellulose, and 1-1.5% of polypropanamide. The invention also discloses a method for producing bentonite for well drilling, wherein the process flow is: raw ore of calcium-based soil, smashing, rolling, feeding, stirring with water, adding alkali powder, carboxymethylcellulose, polypropanamide and stirring, stacking for one week to half a month after reaction, drying, grinding, and sieving. The application of bentonite produced in the method in petroleum geology drilling and non-permeation project of power stations, reservoirs and dams as well as the pipe-jacking construction of cities can lubricate the drill pipe and the drill better and take away the rock debris, and form a mud wall which is thin, but strong and staunch.

The invention provides a manufacturing method of a fluid inclusion slice. The method comprises the following steps carried out in sequence: (1) cutting out a plane on a rock sample, and polishing the plane; (2) injecting glue into the rock sample obtained in the step (1) by adopting glue; (3) solidifying the glue injected into the rock sample obtained in the step (2); and (4) adhering the polished plane of the rock sample obtained in the step (3) to a glass sheet by adopting an adhesive, and performing slicing and polishing to obtain the fluid inclusion slice, wherein the glue used in the step (2) is indissoluble in acid, alkali and / or an organic solvent, and the adhesive used in the step (4) is easily dissoluble in acid, alkali and / or an organic solvent. By virtue of the manufacturing method provided by the invention, a more perfect fluid inclusion slice can be manufactured; and the manufacturing method serves for obtaining a first-class fluid inclusion slice analysis result, and then serves for geological researches of study of mineral deposits, petroleum geology and the like.

The invention relates to the field of petroleum geology, and particularly relates to a rock-fluid reaction in situ observation device capable of controlling temperature and pressure. According to the specific technical scheme, the rock-fluid reaction in situ observation device comprises a reaction body, a sealed reaction chamber formed in the reaction body and an observation mechanism capable of observing rock slice reaction in the sealed reaction chamber, wherein the reaction body is provided with a gas-liquid inlet mechanism and a liquid circulating mechanism, the gas-liquid inlet mechanism comprises a gas inlet and a liquid inlet which are formed in the reaction body, with one ends of the gas inlet and the liquid inlet are communicated with the exterior of the reaction body and the other ends of the gas inlet and the liquid inlet are respectively communicated with the reaction chamber through a connecting channel, and a gas inlet control valve capable of blocking or opening the gas inlet and a liquid inlet control valve capable of blocking or opening the liquid inlet are respectively arranged at the gas inlet and the liquid inlet. By adopting the technical scheme, the invention provides the rock-fluid reaction in situ observation device capable of controlling temperature and pressure, which has the advantages that the experiment time is shortened and the experiment effect is improved.

The invention discloses a device for petroleum geology sampling, and relates to the technical field of geological prospecting tools. The device comprises a drill cylinder and an operating rod, whereinthe operating rod is rotationally mounted on the top surface of the drill cylinder, the inner side surface of the drill cylinder is provided with two cutting placement grooves at the position close to the bottom end, one end of each cutting placement groove is provided with a through hole, the through holes extend in the side wall of the drill cylinder to the top surface of the side wall of the drill cylinder, a cutting rope is fixed at the end, which is away from the through hole, of each cutting placement groove, and the tail end of each cutting rope penetrates through the through hole andthen is wound on the operating rod. When the device is in use, the drill cylinder is pressed into soil through the operating rod, the operating rod is rotated to pull the cutting ropes after the soilcompletely enters the drill cylinder, and the cutting ropes are straightened and cut off the soil, so that the drill cylinder can be easily pulled out, the disturbance on the obtained soil is very small, and the actual soil state can be maintained.

The present invention discloses a well logging predication method relative to paleo-water-depth index parameters, belonging to the basin analysis and petroleum geology field. The method mainly comprises the following steps: a, performing design and sampling according to the real geological condition, performing the elementary geochemistry test of samples of palaeo-lacustrine basin deep low area, and obtaining an actually measured paleo-water-depth index parameter Mn / Fe; b, reading corresponding well logging curve values of the measured samples, wherein the well logging curve values include the resistivity logging RT and the acoustic logging AC; c, building the functional relation among the paleo-water-depth index parameter Mn / Fe, the RT and the AC data; and d, obtaining a longitudinally continuous paleo-water-depth index parameter Mn / Fe curve, and performing error analysis. The well logging predication method relative to paleo-water-depth index parameters can fully employ the conventional well logging materials to predicate the depth of the palaeo-lacustrine basin depositional stage relative to the fossil water, although the predication result is equivalent to the elementary geochemistry method, the predication result is more economic and more practical. The well logging predication method relative to paleo-water-depth index parameters is applied in the jianghan basin jiangling depression and the pearl river mouth basin enping depression, and is high in practicability.

The invention provides a method for identifying oil sources of mixed crude oil and degraded crude oil, and belongs to the field of petroleum geology. According to infrared spectral features of crude oil with different sources and degradation degrees, functional group characteristic parameters capable of sensitively reflecting oil source features and indicating degradation intensity are screened. The functional group parameters are used for researching the oil sources of mixed crude oil and degraded crude oil and have great significance to hydrocarbon accumulation analysis. The method comprises the following steps: taking a sample of mixed crude oil and degraded crude oil in a research zone; preliminarily judging the oil source of the sample, according to relative ratio parameters of organic molecular biological markers of hydrocarbon source rock and reservoir crude oil in the research zone; pulverizing the sample to 180-220 mesh, and performing infrared spectral measurement to the sample, the oil source of which is preliminarily judged according to the organic molecular biological markers; and according to the infrared spectral measurement results, screening functional group parameters that indicate oil sources and degradation intensity, and using the functional group parameters to identify oil sources of mixed crude oil and degraded crude oil.

The invention provides a sealed canister for vacuum-desorbing physically-adsorbed hydrocarbon in soil, belonging to oil / gas exploration field in petroleum geology. The canister includes a canister body, an end cover, and a piston mobile degassing assembly. The end cover is detachably fixed at one end of the canister body. The piston mobile degassing assembly is fixed at the other end of the canister body, and used for changing volume of the sealed canister to realize interior gas pressure rise / fall, thereby realizing the objective of desorbing physically-adsorbed gas in soil sample in the canister and pumping gas under positive pressure. The canister provided by the invention is used to extract physically-adsorbed hydrocarbon in soil sample in manner of total sealing, vacuum degassing by moving piston, and pumping under positive pressure; and has the advantages of high sealability and degassing degree, simple operation, convenient carriage, suitability for batch sample test, shortened sample analysis time and period, and improved efficiency. Meanwhile, cylinder of the canister is marked with volumetric scale, to realize direct and quantitative sampling in the field, avoid sample gas loss due to secondary operation, and guarantee consistent sample size.

The invention relates to a core sampler with controlled cooling water. The core sampler is an apparatus for drilling a core sample, and belongs to the technical field of a petroleum geology apparatus. The core sampler with controlled cooling water controls the on-off of a water seal cooling system through arranging a normally-closed electric water valve and controls the operation of a sampling motor and the normally-closed electric water valve through arranging an alternating current contactor controlled by a button switch. Once the operation state of the sampling motor is controlled, the operation state of the normally-closed electric water valve can be controlled at the same time so as to switch on and switch off a cooling water source of the water seal cooling system and completely overcome the phenomena that the cooling water of the core sampler transversely flows on the operation spot. The invention is beneficial to improving the operation environment with convenient operation and reducing the development cost of petroleum geology exploration, saves a large amount of water resources at the same time, and has simple structure, strong practicability, obvious energy-saving and emission reduction and economic effect.

The invention discloses a visible rock core clamp which is designed to realize that a rock core is visible during a rock seepage simulation experiment so as to meet requirements on scientific research and production. The visible rock core clamp mainly comprises a transparent rubber barrel covering the rock core, an adjustment plunger and a stopping plunger which are used for clamping the rock core, a transparent barrel and an outer barrel which are used for sleeving the transparent rubber barrel, an upstream sealing disk and an adjustment sleeve which are used for sleeving the adjustment plunger, a downstream sealing disk for sleeving the stopping plunger, and an upstream pressure cap and a downstream pressure cap which are used for locking the clamp. The visible rock core clamp disclosed by the invention can be applied to the rock core clamping in the rock seepage simulation experiment in the field of petroleum geology; during experiment, a user can directly observe the experiment condition of the rock core through the transparent barrel and the transparent rubber barrel, so that test failures and test data errors which are caused by medium crossflow can be avoided; a photographing device can be used for monitoring the experiment; an ultraviolet light source can be used for irradiating the rock core, so that the fluorescent reaction of petroleum on the surface of the rock core can be observed, and all experiment researches can be implemented.