294 results about "Mudrock" patented technology

The invention provides a preparation method of microbial agent-containing red-layer sandstone and mudstone interbedding side slope wound surface artificial soil. The microbial agent-containing red-layer sandstone and mudstone interbedding side slope wound surface artificial soil is prepared by effectively mixing the raw material ingredients of the microbial agent, red-layer sandstone or/and red-layer mudstone, farmland soil or/and natural soil, straw, livestock and poultry excrement, high-water-absorbility resin, cement, attapulgite powder and fertilizer under a certain condition. The preparation method has obvious effects of accelerating circulation of soil nutrient elements, increasing supply of soil available nutrients, improving soil physical and chemical characteristics and contributing to recovery of vegetation.

The invention provides a sand-mud stone thin interbed reservoir thickness prediction method. The sand-mud stone thin interbed reservoir thickness prediction method includes the following steps that: performing fine horizon interpretation; extracting a plurality of kinds of seismic attributes of a thin interbed; optimizing the plurality of kinds of seismic attributes to obtain optimized seismic attributes; performing multiple-attribute fitting; and calculating sand body thickness distribution and outputting results. With the sand-mud stone thin interbed reservoir thickness prediction method adopted, problems such as difficult thin interbed oil reservoir structure interpretation, instable sand body transverse distribution and difficult transverse prediction, can be solved, and distribution trends of thin layers (sand layer groups) on a plane can be precisely described, and relative relationships between thinness and thickness can be indicated.

The invention discloses a method for determining a hydrocarbon accumulation threshold of hydrocarbon containing basin fragmentary rock. The method comprises the following steps: (1), establishing a change model about how sandstone and mudstone change with embedded depth in a research zone; (2), establishing a relation model of sandstone and mudstone permeability and porosity; (3), establishing a relation model of sandstone and mudstone hole radii, the porosity and the permeability, and calculating the hole radius values of sandstone and mudstone in different depth; (4), calculating a ratio of mudstone interface potential energy to sandstone interface potential energy, establishing a change model about how the ratio changes with the embedded depth, and determining a maximum boundary and a minimum boundary when the ratio of the mudstone interface potential energy to the sandstone interface potential energy is distributed along with the embedded depth; (5), calculating ratios of the mudstone interface potential energy to the sandstone interface potential energy about a hydrocarbon layer and a dry layer in the research zone, and subjecting the ratios of the mudstone interface potential energy to the sandstone interface potential energy about the hydrocarbon layer and the dry layer in the research zone to the change model established in step (4); (6), dividing a borderline about how the potential energy of the opposite interfaces of the hydrocarbon layer and the dry layer is distributed along with the embedded depth; and (7), sandstone porosity corresponding to an intersection point between the borderline and the maximum boundary of the ratio of the mudstone interface potential energy to the sandstone interface potential energy being reservoir layer critical porosity corresponding to the hydrocarbon accumulation threshold of the research zone.

The invention discloses a red bed mudstone filled-up express railway subgrade and construction method thereof. The subgrade consists of a red bed mudstone filling layer (3), a subgrade bed (2) and a track concrete foundation (1) which are filled on a subgrade base (4) in sequence, wherein, a cross section of the subgrade is of rectangle, the surface of the subgrade adopts a fully-closed water-proof structure (5), a slope of the subgrade is provided with a slope protection structure (6) and strengthened by a slope strengthening structure (11), a waterproof and drainage cushion (7) is arranged between the subgrade base (4) and the bottom surface of the red bed mudstone filling layer (3). The subgrade has the characteristics of high strength, small deformation, good stability and durability, economy, etc., and can fulfill the requirements of high smoothness, stability and durability of ballastless tracks to lines. The construction method is of simple craftwork, reasonable technology, and easy control of filling quality; cost used for purchasing and transporting high-quality fillers can be greatly saved, waste soils caused when the subgrade is filled can be reduced, environment is protected. The invention has important economic and social benefits.

A method for quickly identifying a clastic rock reservoir based on a two well log overlapped picture includes the following steps that (1) according to a clastic rock stratum, an interval transit time parameter and a spontaneous potential parameter of the clastic rock stratum are obtained in a drilling hole through a logging instrument; (2) a relatively thick mud rock development section and a possible compact layer section are determined by referring to rock core or cutting logging data obtained through a special sampler in the drilling hole, and a mud rock base line is determined by combination with a spontaneous potential logging curve; (3) the spontaneous potential logging curve and an interval transit time curve are overlapped in the reverse direction according to a logging curve overlapping principle, and it is required that the two logging curves are basically overlapped on the mud rock base line portion and the compact layer section; (4) in the overlapped picture of the spontaneous potential logging curve and the interval transit time curve, an amplitude difference between the two curves on the separation portion of the two curves is determined according to the overlapping and separation relation between the two curves, and whether the storage physical property of the reservoir is good or not is judged according to the amplitude difference of the two curves. The method has the advantages of being easy and convenient to use, high in identification accuracy and high in speed.

The invention relates to the field of drilling fluids, and discloses a modified nano-silica plugging agent, a water-based drilling fluid, and preparation methods and applications of the modified nano-silica plugging agent and the water-based drilling fluid. The preparation method of the plugging agent comprises the steps: (1) making nano-silica contact with a mixed solution containing acrylic acidand polybutyl methacrylate, and carrying out ultrasonic dispersion to obtain an oil phase solution; (2) contacting water, polyethylene glycol octylphenyl ether and sodium bicarbonate, and carrying out emulsification treatment to obtain a first emulsified solution; (3) carrying out secondary emulsification treatment on the oil phase solution and the first emulsified solution to obtain a second emulsified solution; and (4) under the protection of nitrogen, contacting the second emulsified solution with a water-soluble initiator, and carrying out centrifugal separation on the product obtained after contacting and drying to obtain the plugging agent. The plugging agent can enter stratum pores of a mudstone and limestone interlayer for plugging, has good pressure bearing capacity, can preventpressure transmission from expanding the pores, and can meet the oil and gas exploitation work of mud shale.

The invention relates to a construction method for an immersed tube compaction cast-in-place concrete pile in the construction in a pebble bed, a puddingstone bed, a sand bed, and a strong weathered mudstone. Double casing pipes are hammered, simultaneously, the inner pipe is extracted from the stratum, then concrete is cast into the outer pipe, the inner pipe is positioned into the outer pipe and presses the surface of the concrete, then the outer pipe is pulled up at uniform speed, and the formation of the cast-in-place concrete pile is completed. Earth is not carried out when the hole is formed, therefore the degree of compaction of the earth among the piles is greatly enhanced, simultaneously, when the pile body concrete is cast, no hole collapse phenomenon of the outer pipe appears in the hole, even slurry wall protection is not required to be adopted, in addition, no bottom settlings exists at the bottom of the pile, thereby the characteristic that the bearing capacity of a single pile is high is ensured, and the invention has the advantages of no pollution on site and quick construction speed.

The present invention provides a method for distinguishing calcareous mudstone from sandstone. The method includes the steps as follows: S1, establishing an isochronous stratigraphic framework; S2, performing sparse impulse wave impedance inversion on the basis of the isochronous stratigraphic framework establishment so as to acquire a wave impedance data volume with high lateral continuity; S3, performing sensitivity curve optimization and correction; S4, performing variation function analysis by utilizing the optimized sensitivity curve so as to acquire a parameter probabilistic model with high longitudinal resolution. The method for distinguishing calcareous mudstone from sandstone can increase reservoir prediction precision by utilizing macro-view cognition such as geology and well drilling as a guide, utilizing well log curve as a starting point, and utilizing the corresponding reservoir prediction method as a tool.

The invention discloses a mixed core testing chamber and a mud rock breakthrough pressure testing device. Two mud rock layers are arranged in an inner cavity of the core testing chamber. A sandstone layer is arranged between the two mud rock layers. Reserved spaces exist between the upper mud rock layer and the upper end of the core testing chamber and between the lower mud rock layer and the lower end of the core testing chamber. Water injection openings for injecting water into the reserved spaces, a water and gas injection opening for injecting water and gas into the sandstone layer, and a water drainage opening are formed in the core testing chamber. The water injection openings of the mixed core testing chamber are communicated with a water tank through water pipes. The water and gas injection opening is connected with the water tank and a gas bottle through pipelines in parallel. The water drainage opening is connected into a wastewater pool through a water pipe. A switching valve and a pressure gauge are connected in series on each pipeline. The water tank is connected with a pressurization pump. Multiple probe sets are inserted in the sandstone layer. Pressure and electrical resistivity detected by the probe sets are transmitted into a PC end to be analyzed, and then the mud rock breakthrough pressure testing device is formed. The mud rock breakthrough pressure testing device overcomes the defect that actual formation conditions can not be simulated through traditional breakthrough pressure tests, the change situations of moisture content are tested through the probe sets, and tests can be more precise.

The invention discloses a multi-wave AVO joint inversion method for a sand-shale thin interbed medium. The method comprises the following steps: for a complex thin interbed medium, adopting a VTI medium reflection coefficient equation proposed by Ruger, firstly using the pre-stack AVA corner gather to invert five parameters of an equivalent VTI medium, and then using the parameters of the VTI media and a relationship between its internal single-layer parameters and N/G to reverse the parameters of sandstone and mudstone in the thin interbed and the interbed structure N/G, wherein the result shows that the inversion can always achieve satisfactory effect for whether the VTI medium or the internal parameters of the thin interbed.

The invention relates to the field of petroleum exploration and development, in particular to a lithologic boundary identification method based on well-seismic combination. The method comprises the steps of obtaining seismic data and well logging data of a research area, manufacturing a synthetic seismic record according to an acoustic wave curve and a density curve, calibrating the synthetic seismic record, carrying out seismic response characteristic analysis on a main reservoir, and identifying lithologic boundaries by comprehensively utilizing a stratigraphic body slicing technology, a seismic attribute analysis technology and sand body spread characteristic research, firstly, carrying out the research of seismic attribute depiction in a research area through analysis, carrying out seismic attribute extraction in a sandstone plane spread range of the main reservoir, overcoming the defect that reservoir prediction cannot be carried out through post-stack wave impedance inversion dueto sand shale velocity stacking, improving the lithologic boundary prediction precision, and reducing the exploration and development cost.

The invention discloses a drilling backfill end bearing pile foundation and a construction method thereof. The pile foundation is composed of a pile hole, a prefabricated pile body, a cement mixture hardening layer and a pile periphery backfill layer. The construction method comprises the steps that locating and drilling are carried out till the hole bottom is close to a supporting rocky layer or partially penetrates into the supporting rocky layer; a cement mixture of a preset thickness is injected into the pile hole; the remaining part of the pile hole is backfilled; and before the mixture is condensed, the center of the backfilled pile hole is subjected to hammering for pile sinking, so that the pile body penetrates the backfill layer and a cement mixture filling layer to be extruded and embedded in the supporting rocky layer. According to the pile foundation, the rocky layer hard to penetrate can be penetrated and directly hammered for pile sinking, and a pile tip is prevented from slipping; the destroyed supporting layer can be reinforced by the cement mixture so as to increase bearing force and prevent upper seeping water from softening the supporting layer; and the backfill layer can be compacted and provide constrains for the pile body during pile sinking. The drilling backfill end bearing pile foundation is suitable for supporting layers of strongly and moderately weathered mud rock and sandstone, especially complex geology thick in interlayer, large in number of boulders, large in fluctuation of supporting layers, steep in slope and easy to soften when encountering with water, wherein mechanically formed holes of the complex geology are prone to collapsing.

The invention belongs to the field of oil exploration, and particularly relates to a quantitative prediction method for different-scale fractures of a low-permeability reservoir under constraint of a rock mechanics layer, which comprises the following steps: establishing a single-well fracture development mode, establishing a well-connected fracture development mode, dividing fracture scales, performing a rock mechanics experiment, performing mechanical parameter logging interpretation and dynamic-static correction, dividing various levels of rock mechanical layer structures, establishing a three-dimensional geomechanical model, determining a key fracture forming period, performing three-dimensional ancient stress field simulation, deducing and establishing a soft and hard interbed rock multi-stage fracture criterion and a fracture parameter mechanical characterization model, and performing quantitative prediction on fractures of different scales of a low-permeability reservoir, and finally verifying the reliability of a crack quantitative prediction result through well point actual measurement data. According to the method, the multi-scale fracture parameters of the sand-mudstone interbed type low-permeability reservoir can be accurately obtained and quantitatively represented, the method is suitable for fracture quantitative prediction work of any stratified structure reservoir, and the risk and cost of exploration and development are reduced.

The invention provides a method for preparing artificial soil for redbed sandstone/mudstone interbed side slope surfaces by utilizing biological algae. The method is characterized by preparing the artificial soil by effectively compounding the raw materials such as the biological algae, redbed sandstone rocks or/and redbed mudstone rocks, farmland soil or/and natural soil, turfs, straws, livestock and poultry manures, super water absorbent resin, cement, attapulgite powder and fertilizers under certain conditions. The method has remarkable effects of accelerating the circulation of nutrient elements in soil, increasing the supply of available nutrients of soil, improving the physical and chemical properties of soil and promoting vegetation restoration.

The invention relates to a method for manufacturing a mud-rock sample by adopting white oil as a refrigerant. The method is characterized by comprising the steps of (1) drilling a mud rock sample column, namely (a) for mud cock and the mud cock with cracks, using the white oil as the refrigerant, and (b) drilling the mud rock sample column by adopting a common vertical rock sample drilling machine; (2) encapsulating a rock core column, namely (a) taking out the rock core column, putting the rock core column into heated absolute ethyl alcohol, and washing off the white oil on the surface and gaps of the rock core column, (b) sheathing a thermal shrinkable sleeve in time, and (c) baking the rock core column and the thermal shrinkage sleeve on an alcohol lamp simultaneously till the rock core column is tightly fastened by the thermal shrinkable sleeve; and (3) cutting a sample according to the permeability, namely (a) cutting the overlong rock core column of the mud rock and the thermal shrinkable sleeve on an end-surface cutting machine, wherein consistent length and permeability are required. The method has the advantages that the success rate of the sample can be increased, the rock core sample meeting the requirements can be processed, the environment-friendly effect is achieved and the labor efficiency is high.

The invention relates to a method for evaluating the total organic carbon content of mudstone by using an effective medium theory. The method comprises the following steps: 1, establishing a calculation model for evaluating the organic carbon content of mudstone; 2, determining the shale content, the porosity and the volume fraction of non-conductive skeleton particles in the calculation model; 3,selecting a representative mudstone section rock core sample according to the rock core and logging data, and carrying out whole rock XRD diffraction, porosity determination and rock pyrolysis experiments on the rock core sample; 4, determining undetermined parameters in a total organic carbon content calculation model according to the experimental result; and 5, solving the volume fraction of the organic component according to a binary iterative algorithm, and solving the organic carbon content of the mudstone by combining the conversion relationship between the volume fraction of the organic component and the total organic carbon content. The method for evaluating the mudstone organic matter content in the whole well section is established and used for conducting quantitative predictionand effective comprehensive evaluation on the sedimentary basin hydrocarbon source rock quality.

The invention belongs to the technical field of ecological environment control and discloses an open pit coal mine rock dump-based waste rock soil formation method for land reclamation. The waste rocksoil formation method is a technique as follows: on the basis of evaluating and calculating lithologic differences and spatial distribution of different sedimentary rocks on a minable seam of an openpit coal mine, staggered excavation and classified stripping are carried out on different types of rocks (waste rocks) on the minable seam; the waste rocks are transported and stacked at different positions of a rock dump (waste dump) in a classified manner; layered compaction is carried out; and existing weathered coal, carbonaceous shales, shales, mudstones and the like of the open pit coal mine are stacked on a surface layer to replace soil for land reclamation, and are mixed and fermented with kitchen wastes and household wastes of mine workers for nutrification and organification, thereby completing waste rock soil formation. A treatment method for waste rock soil formation, waste rock reclamation and household waste harmless treatment of the workers for green mining is achieved; a novel soilless land reclamation mode for land reclamation of the open pit coal mine is innovatively formed; and the waste rock soil formation method has great environmental effect, economic effect andsocial effect.

The invention relates to a construction method which can be constructed at a gravel layer, a round gravel layer, a breccia layer, a sand layer or a strong weathered mudstone and can ensure the constructive pile length to meet the design requirements. The construction method is characterized in that: Firstly, an inner pipe with an opening at the bottom is arranged inside an outer pipe with an opening at the bottom, and then the base of a heavy punch is arranged on a round steel plate at the top of the inner pipe. Secondly, the heavy punch is started to hammer the round steel plate at the top of the inner pipe, so that the inner pipe and the outer pipe can be sunk into the bed soil; when the cast-in-place pile is difficult to be implemented, but the constructive pile length can not meet the design requirements, the inner pipe is drawn out, and the filler crushed inside the inner pipe in cast-in-place pile is cleared, and then the inner pipe is inserted into the outer pipe again, after that, the heavy punch is restarted to hammer the round steel plate at the top of the inner pipe so as to make the inner pipe and the outer pipe sink into the bed soil, such process is repeatedly. Thirdly, the inner pipe is drawn out, and a steel cage is arranged into the outer pipe, and the outer pipe is poured with concrete. Fourthly, the surface of the concrete inside the outer pipe is pressed by the inner pipe in which the filler is cleared, and then the outer pipe is pulled out in uniform speed slowly. Fifthly, when all the outer pipes are pulled out, the pipe is vibrated by a vibrating spear. The filler which is squeezed into the inner pipe is cleared repeatedly, thereby the depth of the cast-in-place pile can meet the designed pile length.

A method of evaluating a geological formation (20) of non-homogeneous porosity and permeability, particularly in exploration for hydrocarbon fluids, comprising the steps of:

• • (a) inserting a formation evaluation tool (30) into a borehole (10) to a location (10a) within the geological formation (20);
  • (b) setting the formation evaluation tool (30) into position isolating interval(s) of the borehole (10) with a packer arrangement (50) forming portion of the formation evaluation tool (30), for sample evaluation for said interval(s);
  • (c) extracting representative samples of formation fluid from the location within the geological formation (20) for evaluation under downhole conditions using sampling means (32a, 52b, 54b) operative to extract formation fluid samples over a range of porosity and permeability encountered within the geological formation (20); and
  • (d) analysing the formation fluid samples and measuring formation (20) permeability.

A formation evaluation tool (30) for practising the method, and including an packer arrangement (50) for isolating intervals of the borehole (10) for sample acquisition and evaluation, is also disclosed. The method and tool (30) are particularly suited to geological formations comprising complex carbonate rocks such as mudstones, Wackestone, Packstone, Boundstone and crystalline carbonate rocks which typically include features such as vugs and fractures.

The invention belongs to the technical field of information processing, and discloses an information processing system and method for an array induction logging curve environment influence law, and the method comprises the steps: building a stratum model, and completing the electromagnetic field decomposition, wave field recursion, magnetic component solving and conductivity calculation, curve synthesis and the application range of an analysis instrument based on a numerical mode matching method; carrying out model establishment and response calculation of typical stratums, and studying arrayinduction logging original curve characteristics in uniform stratums, borehole stratums, non-invasive stratums, invasive stratums and stratums of different invasion types; analyzing curve characteristic of drilling fluid resistivity and borehole size influence in the sand mudstone section; analyzing curve characteristics of invasion and surrounding rock influence in the sand mudstone section; andselecting a synthetic curve for providing a basis for oil-water identification work. According to the method, the accuracy of interpretation results of the array induction logging curve can be improved, and a theoretical basis is provided for stratum evaluation and oil and gas identification.

The invention provides a weathering preventing and reinforcing method and a weathering preventing and reinforcing structure of a mudstone side slope of a waste residue storage yard. The method comprises the following steps of: after vegetation of the mudstone side slope (10) of the waste residue storage yard is cleared and the mudstone side slope is trimmed, covering thin polyethylene films (2) added with carbon black to prevent rainwater from intruding and isolate sunlight, wherein a plurality of polyethylene films are of banners and paved from top to bottom, and the adjacent polyethylene films are welded together; fixing the polyethylene films on the slope at welded seams (4) by using soil nails (3), and laying shims (5) between the soil nails and the polyethylene films; and hermetically covering impermeable films (6) at the combined positions of the soil nails and the polyethylene films. In the method, the problems of geological disasters such as sequential landslip and the like caused by mudstone weathering are solved by combining the weathering preventing measure of covering the thin polyethylene films on the surface of the mudstone side slope and the anti-slip measure of reinforcing the mudstone by using the soil nails.

The invention provides a method for recovering lignite mine wastes. The method comprises the steps: stacking carbonaceous gray mud rock, tertiary-system brownish-red clay and quaternary-system aeolian sand, which are produced through mining an opencast lignite mine, in a classified manner, crushing, dehydrating, and adjusting the content of humic acid in the carbonaceous gray mud rock to 10-40%; adding 1-3 parts (by weight) of tertiary-system brownish-red clay and/or 2-4 parts (by weight) of quaternary-system aeolian sand into 1 part (by weight) of carbonaceous gray mud rock, so as to obtain a mixture; adding a mycorrhizal microbial agent into the obtained mixture according to the ratio of 0.001-0.003 kilogram: 1 cubic meter while adding organic matters, enabling the weight of the organic matters to be 15-20% the total weight of a fermenting material, and carrying out fermented aging for 10-15 days at the temperature of 40-60 DEG C and the humidity of 55-65%, so as to a soil conditioner, of which the content of humic acid is 40-70%. The method provided by the invention has the advantages that wastes generated from the opencast lignite mine can be effectively recovered, the industrial added value of lignite mining is greatly increased, and the environment of the opencast lignite mine is improved.

The invention discloses a method for predicting drilling mudstone formation pressure. The method comprises the following steps of acquiring natural gamma, sound wave, density and neutron logging curves; utilizing a natural gamma logging curve to obtain the shale content; obtaining the difference between the neutron porosity and the density porosity according to the neutron and density logging curve; determining a mudstone section according to the mudstone content and the difference between the neutron porosity and the density porosity; obtaining an interval transit time density curve accordingto the acoustic wave and density logging curve; dividing the mudstone section into a mechanical compaction stage, a transition compaction stage and a chemical compaction stage according to the interval transit time density curve; establishing a normal compaction curve in the mechanical compaction stage by performing exponential function fitting; establishing a normal compaction curve in the chemical compaction stage by using a compaction parameter inversion method of actual measurement formation pressure constraint; calculating the interval transit time difference between the starting point and the terminal point of the transition stage by utilizing normal compaction curves of mechanical and chemical compaction stages, and establishing a normal compaction curve of the transition stage; and predicting the mudstone formation pressure by utilizing the normal compaction curve. The method can predict the mudstone formation pressure more accurately.

The invention discloses a synchronous experimental analysis method for oil content and fine components of shale. A synchronous experimental analysis device for the oil content and the fine componentsof the shale is used for synchronous experimental analysis of the shale; experimental data of the oil content and fine component composition and a plurality of saturated hydrocarbon and light hydrocarbon parameters such as the carbon number range, OEP, light-weight ratio, methyl cyclohexane index, naphthenic index and the like are obtained, the purpose of evaluating the oiliness and fluidity of the shale oil reservoir is achieved by utilizing the parameters, and the requirements of shale oil exploration and development on geological experimental technologies are met. After method verification,the characteristics of different particle sizes, different placement time, different oil contents of lithofacies samples and different fine components of the shale reservoir are provided; oily and flowability characteristics of shale with different lithofacies and depths are evaluated, for example, oily green second-third-section layered shale is better than mudstone, green first-section oil shale is better than shale and tends to become better along with increase of burial depth, and an important experimental basis is provided for exploration and production of shale oil four-property evaluation, 'dessert' optimization and the like.

The invention discloses an efficient sampling device of an organic matter-rich mudstone section. The device comprises a base, an annular pedestal, a sample placing assembly, a supporting arm and a connecting arm. The sample placing assembly is arranged in the middle of the base and used for placing an original rock sample to be sampled, the annular pedestal is further fixed to the base, the supporting arm is fixed to one side of the annular pedestal, and the connecting arm is connected to the supporting arm in an up-down moving mode; a sampling assembly is arranged at the other end of the connecting arm through a mounting base, a sampling end of the sampling assembly is cylindrical, and a columnar sample can be separated from an original rock sample by driving the sampling end to rotate sothat subsequent mechanical testing is facilitated; and the annular pedestal is further provided with a plurality of sets of flexible clamping assemblies, the flexible clamping assemblies can flexiblypress the original rock sample downwards from the upper portion of the original rock sample, the original rock sample can be kept in the state that the original rock sample is jointly clamped by theflexible clamping assemblies and the sample placing assembly, and stability of the original rock sample in a sampling process is improved.