A Method for Predicting the Distribution Range of Sedimentary Facies in Piedmont Area
A prediction method and technology of sedimentary facies, which is applied in the field of oil and gas exploration and development, can solve the problems of inaccurate prediction method of the distribution range of sedimentary facies, and achieve the effect of low cost and easy data acquisition
Active Publication Date: 2018-12-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0005] The present invention aims at the above-mentioned technical problem of inaccurate prediction method for the distribution range of sedimentary facies in the piedmont region, and proposes a method for predicting the distribution range of sedimentary facies in the piedmont region, which can accurately determine The extension distance of sedimentary facies belts in the piedmont area, and then accurately predict the distribution range of sedimentary facies belts
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Embodiment 1
[0068] Predicting the distribution range of sedimentary facies belts in the piedmont area of Bogda Mountain includes the following steps:
[0069] (1) According to the outcrop profiles in this area, the sedimentary facies types of different horizons in each profile are identified by using sedimentary facies markers. Alluvial fan facies, fan delta facies, braided river delta facies, and meandering river deltas are developed in this area There are seven types of sedimentary facies, including facies, fluvial facies, shore-shallow lacustrine subfacies, and turbidite fans. Such as image 3 As shown in , select several measuring points for each type of sedimentary facies, and measure the distance L from each measuring point to the provenance area.
[0070] Taking the fan delta facies as an example, a total of 11 survey points were selected and named respectively as survey point 1, survey point 2 ... survey point 11, and the distance to each survey point was measured by using the ...
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The present invention proposes a method for predicting the distribution range of sedimentary facies belts in the piedmont area, comprising the following steps: identifying the type of sedimentary facies according to the field outcrop profile of the research area, selecting measuring points, and measuring the distance from each measuring point to the provenance area; calculating The true thickness of each stratum in the stratum corresponding to each measuring point and the true thickness of the stratum corresponding to the measuring point; according to the obtained true thickness of the stratum corresponding to each measuring point and the true thickness of each glutenite stratum in the stratum, calculate the The sand-to-ground ratio corresponding to a measuring point; according to the distance from each measuring point to the provenance area and the sand-to-ground ratio data corresponding to the measuring point, establish the functional relationship between the sand-to-ground ratio and the distance from the provenance area; The functional relationship between the ratio and the distance from the provenance area can predict the distribution range of sedimentary facies. Based on the analysis of the sand-to-ground ratio of outcrops in the field, this prediction method can accurately determine the extension distance of the sedimentary facies belt in the piedmont area, and then accurately predict the distribution range of the sedimentary facies belt.
Description
technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration and development, and in particular relates to a method for predicting the distribution range of sedimentary facies belts in piedmont areas. Background technique [0002] Sedimentary facies belt refers to the synthesis of all sedimentary rocks formed in a certain depositional environment. Favorable sedimentary facies belt is an important condition to control large-scale oil and gas accumulation. The distribution law of sedimentary facies belt is an important factor restricting the process of oil and gas exploration. The extension distance of can well reflect the planar distribution of sedimentary facies. [0003] At present, the piedmont area of extrusion basins is an important area for oil and gas exploration in western my country. Determining the extension distance of sedimentary facies belts in the piedmont area can effectively predict the distribution range of se...
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IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 王健操应长王新桐徐琦松金杰华王心怿肖杰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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