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2 results about "Pressure solution" patented technology
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In structural geology and diagenesis, pressure solution or pressure dissolution is a deformation mechanism that involves the dissolution of minerals at grain-to-grain contacts into an aqueous pore fluid in areas of relatively high stress and either deposition in regions of relatively low stress within the same rock or their complete removal from the rock within the fluid. It is an example of diffusive mass transfer.
A method for identifying facies of carbonate rocks
The application discloses a method for identifying lithofacies of carbonate rocks, and particularly relates to the technical field of rock analysis, and comprises the following steps: S1, digital processing of rock slices; S2, analysis of diagenetic sequence characteristics; S3, spatial modeling of lithofacies characteristics; S4, optimization of dynamic determination rules; and S5, attribution of carbonate rock lithofacies. According to the method, backscattering images are collected and subjected to digital processing, the geometric morphology of rock fabric and the element ratio of cements are uniformly quantified, and multiple diagenetic indicators such as pressure solution suture line curvature and top-bottom structure frequency are fused to construct a multi-dimensional characteristic space defined by sedimentary fabric and diagenetic modification. According to the distribution of special phenomena such as bird eye structure, the weight of key parameters and the determination critical value can be dynamically adjusted, and finally, the automatic attribution of lithofacies is realized, and the objectivity and accuracy of the identification of complex carbonate rock lithofacies are effectively improved.
Owner:SHAANXI YANCHANG PETROLEUM GRP
A radial multi-hole composite reservoir cave calculation method, system, device and medium
ActiveCN117350005BDesign optimisation/simulationSpecial data processing applicationsCalculation methodsCave
The application discloses a kind of radial multi-hole composite oil reservoir cave calculation method, system, equipment and medium, S1, fracture-cave carbonate rock oil and gas reservoir is divided into two parts, one part is cave and matrix, another part is the region where fracture is, fracture-cave carbonate rock multi-hole oil and gas reservoir is simplified as single-hole composite oil and gas reservoir;S2, the dimensionless pressure solution of well bottom of single-hole composite oil and gas reservoir is calculated;S3, the derivative curve of well bottom dimensionless pressure solution is obtained, and the derivative curve of well bottom dimensionless pressure is fitted measured well bottom pressure and its derivative curve, when two double logarithmic curves coincide, the simplified cave radius is inverted, to obtain cave volume.Can accurately calculate the cave volume when cave is individually distributed in stratum.
Owner:PETROCHINA CO LTD