9 results about "Sedimentary depositional environment" patented technology

The invention discloses a high-precision recovery marine facies compact limestone sedimentary environment and oil-gas dessert area prediction method. The method comprises the steps that S1, an argillaceous limestone phase, an argillaceous limestone phase, a mud-powder crystal limestone phase and a paste limestone phase are divided through X-ray diffraction and slice identification; s2, utilizing a chemical weathering index CIA, a Sr / Ca salinity index and delta 13Corg organic carbon isotope to synergistically recover paleo-climate and paleo-hydrological conditions; s3, combining total organic carbon TOC, organic matter maturity Ro, terrestrial input Al and Ti content and nanopore development degree, and establishing an organic matter-rich high-quality lithofacies evaluation standard; and S4, according to an evaluation standard, well drilling, well logging and seismic data are fused to predict the oil and gas sweet spot area. Through the four steps of lithofacies division, paleoenvironment recovery, evaluation standard establishment and dessert area prediction, high-precision recovery of the marine facies compact limestone sedimentary environment is realized, the dessert area prediction success rate is improved to 78%, and efficient technical support is provided for oil-gas exploration.

The present invention discloses a method for multi-scale evaluation of the capping ability of mass transport deposits. The method is as follows: identifying mass transport deposits; judging the continental margin type, depositional system tract, depositional environment and submarine landslide source of the mass transport deposits; finely depicting the mass transport deposit system in seismic profiles, distinguishing its strain domain, counting its thickness, identifying the number of fluid escape structures and the number of floating blocks; establishing an evaluation matrix diagram, plotting the evaluations of each parameter on the above diagram; listing an evaluation table based on the plotting results, assigning scores to each parameter, and calculating the average scores X 盆地 and X 地震 ; based on the sub-item evaluation results, calculating the capping ability score by weighted calculation to determine the capping ability of the mass transport deposits. Starting from seismic profiles, the present invention comprehensively analyzes the capping ability of mass transport deposits with multi-scale parameters, and finally realizes the semi-quantitative evaluation of the capping ability of mass transport deposits to meet the requirements of oil and gas exploration and development at different stages.

The application discloses a kind of geologic history period microbial dolomite deposition mechanism quantitative simulation calculation method, which comprises the following steps: accurately assess whether the signal of original depositional environment of sample is preserved during deposition period, calculate the concentration of pH value, total alkalinity, calcium ion and magnesium ion of paleoseawater during deposition period, reconstruct the attribute parameter of paleoseawater in geologic history period, quantitatively analyze the different influence of the difference of physical and chemical conditions of paleoseawater on the deposition process of microbial dolomite, simulate and calculate the microbial dolomite genesis mechanism and process in geologic history period.The application quantitatively and comprehensively studies the microbial dolomite genesis mechanism, and can provide new ideas for the genesis of similar dolomite in geologic history period and the comprehensive solution of the old mystery "dolomite problem".

The invention discloses a transition phase shale deposition environment identification method, device and equipment and a medium. The method comprises the following steps: determining a basin area to be measured, wherein the basin area to be measured is a basin area formed by a carboniferous-permidoid coal-bearing stratum; detecting transition phase shale in the basin area to be detected to obtain sedimentary index parameters and geochemical index parameters corresponding to the basin area to be detected; and based on the sedimentary index parameters and the geochemical index parameters corresponding to the to-be-measured basin area, determining a transition phase shale sedimentary environment classification result of the to-be-measured basin area through a preset transition phase shale sedimentary environment classification model. According to the scheme, the transition phase shale deposition environment classification result of the to-be-detected basin area is determined through the preset transition phase shale deposition environment classification model, the limitation that only a transition phase shale object in a single area is effective is solved, and the universality and accuracy of the method for identifying the deposition environment through the transition phase shale are improved.

The application discloses a method and device for identifying an evaporite sedimentary environment, and the method comprises the following steps: determining a sedimentary sub-environment of a single well in a study area according to core data and geochemical analysis data of the single well; establishing an environment identification chart according to the determined sedimentary sub-environment, a trace element uranium value in the geochemical analysis data and a logging curve gamma value; and determining an evaporite sedimentary environment of a single well to be identified in the study area according to a logging curve uranium value and a logging curve gamma value of the single well to be identified, and combining the environment identification chart.

The invention discloses a compressibility-based deep coal rock sweetness section evaluation method, which comprises the following steps: S1, extracting logging inversion data, and carrying out normalization processing on the logging inversion data; s2, respectively calculating a rich gas parameter and a compressible parameter by using the well logging inversion data normalized in the step S1; s3, establishing a coal rock sweetness index by using the rich gas parameter and the compressible parameter obtained in the step S2; s4, performing wavelet reconstruction on the natural gamma index, and drawing an energy spectrogram; and S5, combining the coal rock sweetness index obtained in the step S3 with the energy spectrogram drawn in the step S4, and carrying out coal rock sweetness section division and the like. According to the method, the sweetness segment is explained through wavelet reconstruction, the development relation between the coal rock sedimentary environment and the sweetness segment can be reflected, and the sweetness segment can be judged more reasonably, more quickly and more accurately.

A method can include, responsive to receipt of a search instruction that includes one or more search criteria, accessing a data structure for subsurface geologic regions categorized at least in part according to parameters that describe depositional environments, where the data structure includes one or more includes virtual distances between the parameters; generating a search result using the one or more search criteria and the data structure, where the search result represents an organization of at least a portion of subsurface geologic regions as closest analogues to the one or more search criteria; and transmitting search result information for graphically rendering the search result to a display as part of an interactive graphical user interface.

The application provides a method for determining the genesis and sedimentary environment of siliceous rocks by using multi-index comprehensive analysis, relates to the technical field of geological exploration and geochemistry, and comprises the following steps: pretreating a siliceous rock sample to obtain a to-be-tested powder sample; testing the to-be-tested powder sample to obtain the content of corresponding elements; calculating and obtaining a genesis parameter for characterizing the genesis type of the siliceous rock, and then obtaining a genesis type determination result; calculating and obtaining an environment parameter for characterizing the sedimentary environment of the siliceous rock, and then obtaining a sedimentary environment determination result; and comprehensively analyzing and cross-verifying the determination results to form a final discrimination conclusion. The application can effectively distinguish hot water deposition, biological genesis and composite genesis siliceous rocks by comprehensively analyzing multiple indexes such as major elements, trace elements and rare earth elements, and combining multiple graphic cross-verifications, obviously reduces the multi-solution and subjectivity of traditional single-index discrimination, and accurately determines the sedimentary environment such as continental margin and ocean basin through element ratio and graphic analysis.

The invention discloses a subterranean area tidal plateau facies mixed rock sedimentary cycle division method, and relates to the technical field of geophysical exploration. Comprising the following steps: carrying out microscopic feature observation under a mirror on a coring section of the shallow water tide plateau phase mixed rock so as to obtain the content of characterization minerals of the coring section; performing linear fitting on the content of the characterization mineral substance of the coring section and a GR logging curve, and establishing a logging curve and mineral content conversion model; on the basis of the logging curve and mineral content conversion model and the GR logging curve value, the non-cored well section is calibrated to represent the mineral content, so that a vertical change curve representing the mineral content of the whole target interval is established; determining the deposition environment according to the characterization mineral content; and based on the change of the depth of the water body reflected by the sedimentary environment recovery, dividing the sedimentary cycle of the tidal plateau phase mixed rock. According to the method, under the condition that part of wells are not cored, the tidal plateau phase mixed rock in the subterranean area can be divided, and the method plays an important role in guiding exploration and development of a research area.