787 results about "Oil exploration" patented technology

Disclosed is a method of determining the extent of recovery of materials injected into a oil well comprising the steps of: a) preparing a material to be injected into an oil well; b) admixing therewith a chemical tracer compound at a predetermined concentration; c) injecting the admixture into an oil well; d) recovering from the oil well a production fluid; e) analyzing the production fluid for the concentration of the chemical tracer present in the production fluid; and f) calculating the amount of admixture recovered from the oil well using the concentration of the chemical tracer present in the production fluid as a basis for the calculation. Fluorinated benzoic acids are disclosed as a preferred tracer.

The invention relates to an instrumented tubular device for transporting a pressurized fluid notably in the field of oil exploration and in that of the transport of gas or hydrocarbons. This device comprises a tube (20) in which this fluid flows, with which are associated means for measuring the main deformations of this tube, and means for measuring the temperature of the fluid in the tube. This tube is equipped with measurement means integral with its surface and offset by at least one remote optical cable towards an electronic measurement system. These measurement means are means for assembling at least two non-parallel optical fibers which comprise at least three assemblies (B1, B2, B3) of at least two optical gages with Bragg gratings attached to at least three measurement locations (22) and connected to the remote optical cable (23) via optical fibers. At least one assembly further comprises a temperature gage.

An apparatus and method for analyzing known data, storing the known data in a pattern database (“PDB”) as a template is provided. Additional methods are provided for comparing new data against the templates in the PDB. The data is stored in such a way as to facilitate the visual recognition of desired patterns or indicia indicating the presence of a desired or undesired feature within the new data. The apparatus and method is applicable to a variety of applications where large amounts of information are generated, and / or if the data exhibits fractal or chaotic attributes.

The invention relates to the earthquake exploration position calibration technology based on the pre-stack wave field simulation, belonging to the seismic data processing and interpretation technology field in oil exploration. The invention considers the seismic information acquisition and processing impact, considers multiple waves and conversion waves action in the reflection waves, enhances the accuracy of integrated seismic records, and enhances the consistency of integrated seismic records and real seismic records, this approach including the following eight steps: filtering and editing of density and acoustic logging well curve; using density and acoustic logging well curve to calculate the wave impedance curve; using statistics sub wave to integrate the seismic records; comparing the integrated seismic records and well-side seismic road, properly stretching the logging well curve; using well-side seismic road and logging well reflection coefficient curve to extract certainty sub wave; using the reflection rate method to simulate the pre-stack common reflection points roads set; simulating the real seismic data processing, and obtaining the final integrated seismic records; using the final integrated seismic records and comparing with the well-side seismic road, to process seismic exploration position calibration.

Disclosed is a method of determining the extent of recovery of materials injected into oil wells or subsurface formations. The method includes injection of one or more tracers into an oil well or into a formation. Included in the method are the steps of introducing a material of interest into the oil well or into the subsurface formation associated with the bore of the oil well; introducing a tracer into the oil well or into the subsurface formation associated with the bore of the oil well; recovering from the oil well a production fluid, analyzing the production fluid for a concentration of the chemical tracer present in the production fluid; and calculating the amount of material of interest recovered from the oil well using the concentration of the chemical tracer present in the production fluid as a basis for the calculation.

The invention belongs to the field of oil exploration and particularly relates to an effectiveness evaluation method for a compact sandstone reservoir map cracking system. The effectiveness evaluation method for the compact sandstone reservoir map cracking system includes the following steps that a crack discrete network geologic model is established, crack formation periods are statistically analyzed, crack filling sources are statistically analyzed, crack superior filling directions and systems are statistically analyzed, crack filling master control geologic factors are analyzed, the relation between the crack permeability and current primary stress is established, and the space effectiveness of the map cracking system is evaluated. The purposes of accurately acquiring effective evaluation of compact sandstone reservoir well point crack filling periods, filling superior directions, filling degrees and the space effectiveness of the map cracking system are achieved, the filling degrees and the filling superior directions of compact sandstone reservoir cracks under the multi-period formation fluid precipitation and crystallization effect are effectively predicted, guarantees are provided for fracturing modification design and development scheme optimization of a fractured reservoir, and the risk and cost of exploration and development are reduced.

An apparatus, system, and set of methods are provided for building templates that can be used in the exploration and production oil and gas deposits. A personal computer is used to perform calculations on known data to generate hyperdimensional templates that are stored within a pattern database. The hyperdimensional templates are generated in a layered series of cutting, attributing, and statisizing phases using data known to represent existing oil and gas reservoirs. The hyperdimensional templates are stored in a pattern database. Methods are provided for identifying misclassifications and otherwise determine the quality of the templates in the pattern database.

The invention is a seismic emission device designed to be immersed at the bottom of a water body (sea, lake, etc.), and method of implementation. The device comprises at least one (and preferably several) self-contained emission units (1) immersible at the bottom of a water body, combining at least one or more seismic wave sources (8), such as air guns for example, suited to be placed in contact with the body, local energy storage (9) which supplies the device a multifunction connection cable (5) connecting each self-contained emission unit to a surface relay unit (4), a communication system (4a, 6a, Y) providing communication with a central control station (6) located for example on a drilling or production platform (3). VSP repetitive exploration operations can be carried out in a well by activating successively the various emission units and by acquiring the signals picked up by receivers R1-n placed in a well for example and coupled with the formation. The device can be used for oil prospecting.

The invention relates to an exploration method of faulted basin slope oil reservoir distribution and belongs to the field of oil exploration technology. In allusion to the later period of faulted basin exploration, through statistics of related information of source rock, fluid potential, sedimentary rock phase and fault in a target area and according to the principle of source potential conduction, the above information is comprehensively analyzed so as to determine a favorable oil reservoir distribution area in the target area. Forward oil control exploration limitations are broken and are shifted to negative structure and positive structure. Comprehensive analysis is carried out according to an oil source, fluid potential, sedimentary facies distribution and fault occurrence in the area, the slope is evaluated, and a favorable exploration target area is selected.

Acoustic waves exhibit a a streaming force that pushes objects along the direction of sound propagation. Precise motions require well-focused beams. The technique of time-reversal acoustics (TRA) overcomes beam distortions introduced by propagation along irregular paths to focus sound without knowledge of the medium properties. TRA requires a small receiver to be placed at a point of desired focus. The invention disclosed refines TRA by introducing data matching schemes to extend the points of focus beyond the location points of the receivers. With as few as two receivers, a large region can be manipulated with well-focused acoustic beams and with no receiver at a desired point of focus. Applications are described in drug delivery in medicine; environmental fluid contaminant control; and in oil exploration, for retrieving oil stuck in underground pockets.

A system, method and apparatus are provided for applying templates to find deposits of oil and natural gas. A personal computer is used to perform calculations on known data to generate hyperdimensional templates that are stored within a pattern database. The hyperdimensional templates are generated in a layered series of cutting, attributing, and statisizing phases using data known to represent existing oil and gas reservoirs. The hyperdimensional templates are stored in a pattern database. The templates are used in comparison to target data sets in order to detect patterns that are consistent with reserves of oil and / or natural gas.

PCT No. PCT / CN96 / 00104 Sec. 371 Date Sep. 29, 1998 Sec. 102(e) Date Sep. 29, 1998 PCT Filed Nov. 20, 1996 PCT Pub. No. WO97 / 19370 PCT Pub. Date May 29, 1997The general object of the present invention is to provide a method for determining and displaying the relative changes of elastic moduli and that of density of geologic formations and for utilizing these relative changes and plottings for gas / oil exploration, especially for direct gas and light oil detection. The said relative changes of elastic moduli are the relative change of Lame constant DELTA lambda / ( lambda +2 mu ), the relative change of shear modulus DELTA mu / ( lambda +2 mu ) and / or DELTA mu / [ kappa +(4 / 3) mu ], the relative change of bulk modulus DELTA kappa / [ kappa +(4 / 3) mu ]; and the relative change of density is DELTA rho / rho .

The invention provides a method for improving computing the precision of rock fracture parameters, for performance evaluation and drilling of oil and gas reservoirs in oil exploration. The method comprises the following steps of: working out fracture directions and the fracture density by using more than two seismic attributes for uniformization treatment, computing the coefficients of rank correlation of the fracture directions in pairs to obtain the rank correlation and fracture density coefficient, and if the correlation coefficient is over 0.9, determining that the density or direction is the density or direction with highest precision; otherwise, computing absolute error values of the fracture directions corresponding to all attributes at the well point, and sorting the absolute error values according to an order from small to large; computing the coefficients of rank correlation of the fracture density corresponding to the attributes and the coherency attributes, sorting the coefficients of rank correlation according to an order from small to large, and finally computing the fracture directions with the highest precision. The method can ensure the leading position of basic attributes and correct the final result to varying degrees according to the data quality so as to improve the forecast precision by using the existing information.

The invention discloses an embedded oilwell parameter real-time acquisition system, relates to the fields of information technology and automation and information processing technology, and is an oilwell data real-time acquisition and storage device completed by ARM embedded design technology. The acquisition system consists of an ARM acquisition unit, a wireless communication module, a power supply and a sensor, and combines an embedded operation system with opening source codes and embedded application programs to form an embedded data acquisition and storage terminal. The acquisition system can autonomously complete set data acquisition and storage tasks, perform communication with far end computers in a wireless mode, be used as a distributed monitoring terminal of an oilwell production control platform in ocean or desert environment, and acquire and store multiple kinds of data of the sensor such as pressure, temperature, and the like, has the maximum storage capacity of tens of millions of data records, and can improve the real-time characteristic of parameter monitoring in the oilwell production process, reduce occurrence possibility of blowout accidents, and improve working benefits of oil exploration and safety production.

The invention relates to an intellectual high temperature high pressure dynamic stopping leak appraisal device in the field of oil exploration and development excremental device. it is formed by a gas source, a mud pump, a piston-type high temperature high pressure mud bottle, a steel leaked bed holder, a work holder, a rock core holder, a flow-meter, an electric dissimilar, a ring pressure pump, a return pressure controller, a liquid circulating pipe, a control line, a data collector, a computer and a printer and so on. It arranges the drilling fluid of the leak agent into the mud bottle on the condition of temperature, pressure, flow speed of the simulated formation; it then uses mud pump to drive the borehole fluid of the piston-type high temperature high pressure mud bottle and dose leak damage experiment to the steel leaked bed holder, the artificial slit plate and the formation rock core to achieve the indoor correct evaluation of the leak effect of the drilling fluid and the well completion fluid.

The invention is a high pressure high temperature rock core dynamic damage estimate apparatus. It comprises straight pump mud pump, high pressure liquor tank, side plane circulating multi test point rock core pick, flow meter, gas source, pressure sensor, round pressing pump, return pressure controller, data gatherer and computer. Based on simulated rock temperature, pressure, flow speed, first obtain the original percolation rate on each section of rock core, then the mud pump drives the well liquor in the high pressure liquor container, obtain the percolation rate of each section of rock core without taking out the rock core, finally make out an evaluation of the damage the well liquor to the rock core so to pick out the drill liquor protective to the oil layer and the complete well liquor system.

A convective accelerometer capable of measuring linear or angular acceleration, velocity, or angle of inclination is provided. The accelerometer comprises sensing elements that are sensitive to convection located inside a sealed housing containing a liquid agent. Applied external acceleration causes forced convection of the liquid agent, which produces variations in an electric current produced by the sensing elements that are proportional to the applied acceleration or angle of inclination. The accelerometer has a small size, extremely wide frequency and dynamic ranges, high sensitivity, simple design and is suitable for mass production. The device has a wide range of application, such as stabilization and control systems, homeland security, and oil exploration.

The invention discloses a flexible composite radiation shielding material which is manufactured by the processes of mixing, crushing, granulating and extruding after proportionally blending a substrate material with a shielding material. The substrate material is a thermoplastic elastomer (TPE), and the content of the TPE accounts for 15-95% of the total weight; the shielding material is boron compounds, lead, tungsten and compounds thereof; the content of the boron compounds accounts for 0-75% of the total weight; and the contents of the lead, the tungsten and the compounds thereof account for 0-85% of the total weight. The radiation shielding material has good flexibility and good repeated bending property, and can be directly applied to neutron and / or gamma radiation shielding occasions. Protective clothing made of the flexible composite radiation shielding material has the advantages of good shielding effect, simple structure, convenient wearing and good operating adaptability, can be used for radiation protection of personnel in near operations such as oil exploration, nuclear chemical industry, medical industry, special industry and the like so as to prevent damage of human body caused by the neutron and / or gamma radiation. The radiation shielding material can also be applied to clad shielding of normal-temperature pipes and hot pipes, and radiation shielding in other occasions.

The invention concerns a so-called capstan winch (1) comprising drums (2, 3) driving a cable (C) and provided with a peripheral wall (22, 32) around which are strung independent peripheral rings (40–45, 50–55). Said rings are provided with a peripheral groove designed to receive the cable (C) and are made of an elastic material so as to allow both the cable (C) to be driven and a relative sliding movement between the peripheral rings (40–45, 50–55) and the peripheral wall (22, 32), the relative sliding movement being of amplitude substantially equal to longitudinal deformation of the cable (C), when it is subjected to tension stresses. The two drums (2, 3) can be axially offset relative to each other (p / 2) and their axes of rotation (Δ1, Δ2), may form a non-null angle of inclination. The invention is particular applicable to deep sea oil exploration.

The invention discloses an integrating method of a hybrid integrated circuit with controllable working temperature. The method comprises the steps of integrating a common hybrid integrated circuit on the right side of a frontal base aluminium nitride ceramics substrate, integrating a semiconductor freezer on the back of the frontal base aluminium nitride ceramics substrate, respectively leading out connecting lines from two ends of a N type semiconductor and a P type semiconductor, bonding, and connecting the whole circuit. A thermal resistor, which is clinging to a temperature-sensitive semiconductor core, is provided in the device for detecting the inner working temperature of device. An exterior controllable switch circuit and the current direction are controlled by tracking the change of the resistor to check the change of the voltage at two ends of the resistor and to control temperature by controlling the frequency of increasing or decreasing temperature. The integrated circuit of the invention is widely applied to the fields such as space flight, aviation, ship, precise instrument, geological exploration, oil exploration, communication, industrial control, etc. The invention has an expansive market prospect.

The invention discloses a multifunctional floating nuclear energy device which comprises a reactor that is mounted in a safe housing. Heat pipeline of the reactor is connected with a steam turbine. The steam turbine drives a power generator to generate electric power. The heat pipeline of the reactor is directly connected with a seawater desalination system, a domestic warming system and a heavy oil exploration system. Furthermore high-temperature hot air discharged from the turbine engine is conveyed to the seawater desalination system, the domestic warming system and the heavy oil exploration system through secondary pipeline. According to the multifunctional floating nuclear energy device, the reactor which is carried by a barge is used as a power source. Power which is generated by the power source is diverted. Besides power generating by the steam turbine, the power generated by the power source is also used for seawater desalination, warming, heavy oil exploration. Multiple treatments are performed on the power of the nuclear reactor, thereby settling a problem that an existing floating nuclear station can only be used for generating power, enriching kind of energies and facilitating composite type energy supplying of specific items of marine operation, etc. Through performing secondary utilization on the energy which drives the steam turbine, utilization rate of the nuclear reactor is greatly improved.

The present invention discloses petroleum exploration well-drilling liquid used non-blooming anti-collapse and anti-falling filtration agent, which is confected by coal gangue 500Kg, waste orlon thread 270Kg, sodium hudroxide 100Kg, formaldehyde 20Kg, sodium nitrite 30Kg, sodium bisulfate 30Kg, phenol 50Kg, and water 3000Kg. The cost of the processing raw material of the product of the present invention is low, compared with the same kind of the product, the cost of the well-drilling slurry can be lowered by 30 percent, during the well-drilling process, the using volume is less, in the fresh water, 1 percent volume can be added, in the sea water, 3percent volume can be added, the performance is better than the performance of all the lignite resin products, the circumference of the drilling tool can form smooth and hard filtration cake to prevent the well wall from collapsing, to control the mudstone and the clay shale from swelling by absorbing water, to control the water lost volume, so as to improve the well-drilling schedule. The raw material adopted by the present invention is all non-blooming material, which has no interference to geological log, the product petroleum field is large in demand volume, and great in market potential. The present invention also discloses the preparation method for above anti-collapse and anti-falling filtration agent.

The invention discloses an application method of a ground sand washing device for a horizontal well. A sand washing well head device arranged at the head of the horizontal well is connected with a downhole sand washing pipe column, continuous high-pressure circulated sand washing on the ground is carried out by a ground sand washing pipeline, a pressure releasing valve and a conversion valve that are arranged on the sand washing pipeline, a sand washing fluid flowback pipeline and the like to realize continuous negative pressure sand washing in the horizontal well. The ground sand washing device for the horizontal well is suitable for continuous sand washing operation of the horizontal well for sand production during oil exploration, can be applied to sand washing and slurry replacing in the horizontal well, sand washing in a lower formation pressure oil well and the like, and can be used for effectively solving the problem of sand washing in highly-deviated and horizontal sections of the horizontal well and avoiding the damage caused by the recharged sand washing fluid to an oil layer.

The invention relates to a high temperature and high pressure shale well wall stability evaluation device and belongs to the technical field of evaluation devices of test of hydrocarbon reservoir protection in the process of petroleum exploration and development. The high temperature and high pressure shale well wall stability evaluation device is characterized by comprising a well wall analog device, a triaxial cell (11), a mud container (14), a piston container (16), a constant-flux pump (17), an electric metering pump (18), a mud pump (20) and a data collection processing system. The high temperature and high pressure shale well wall stability evaluation device can carry out drilling fluid washing damage test on an analog well wall on the condition that temperature, pressure and circulating fluid flow are simulated. An imaging method is used for simulating degrees of hole enlargement, hole shrinkage and collapse after the well wall is eroded by external liquid, microwaves are used for measuring the degrees, and therefore the washing degrees of the well wall and wall building situation can be observed and recorded in real time. A new method for comprehensively evaluating influence of the drilling fluid and completion fluid on instability and collapse degree of the well wall is provided. Besides, the high temperature and high pressure shale well wall stability evaluation device has the advantages of being good in repeatability, simple in structure, convenient to operate, stable in performance and the like.

The invention relates to a pre-stack non-linear inversion method based on a particle swarm optimization algorithm. Along with the sustained and steady growth of the economy of the country, the need for energy sources is also sustainedly and quickly increased and a serious test of shortage of oil and natural gas resources can inevitably appear. Reservoir prediction is an important research link in oil exploration production; information (contained in a seismic data) about structure, lithology and the like of subsurface formation needs to be fully utilized to find high-quality reservoirs; the information is frequently obtained through seismic inversion; but the conventional inversion is based on a linear and simplified model and is disturbed by a plurality of human factors, and high-precision reservoir parameters frequently cannot be obtained. According to the method, a research on the topic of the particle swarm optimization algorithm is carried out; the Zoeppritz equation is deduced and simplified on the basis of the idea and the principle of the particle swarm optimization algorithm to ensure that the equation is suitable for the solution of the particle swarm optimization algorithm; the particle swarm optimization algorithm is used for the pre-stack inversion; and the pre-stack inversion is respectively carried out on the two-dimensional theoretical model and a offshore seismic data so as to obtain a satisfactory result.

The invention provides a gas layer and water layer recognition method for a low-porosity and low-permeability reservoir, belonging to the field of oil exploration and development. According to the porosity logging measurement principle, through analyzing factors affecting the logging porosity curve value, the method for recognizing gas layer and water layer in high-salinity mud filtrate and low-porosity and low-permeability gas reservoir is provided by the invention. The gas layer and water layer recognition method based on a low-porosity and low-permeability reservoir provided by the invention is easy to implement, has high operability and is intuitive and clear in recognition; the accuracy of gas layer fluid recognition can be improved greatly while the cost is lowered by utilizing the method provided by the invention; and the method has a wide application range in field practice, and the method has great operability for either low-porosity and low-permeability volcanic rocks or carbonate and sand shale.