Representation method for diagenetic seismic facies of sandstone reservoir

Abstract

The invention discloses a representation method for diagenetic seismic facies of a sandstone reservoir. According to the representation method for the diagenetic seismic facies of the sandstone reservoir, quantitative indexes of typical rock electric parameters for reflecting the diagenetic characteristic of the sandstone reservoir and the environment are utilized to accurately evaluate the diagenetic facies longitudinal phase sequence of the sandstone reservoir of a non-core hole and the plane distribution and the rule of the diagenetic facies of the target stratum reservoir, more effective technical information is provided for sandstone oil and gas exploration and development, favorable blocks of the sandstone oil and gas exploration and development are optimized, the forecasting accuracy of the favorable blocks is improved, the success rate of exploration and development is improved, and the cost of exploration and development is lowered.

Description

technical field [0001] The invention belongs to the technical field of sandstone reservoir oil and gas exploration and evaluation design, and in particular relates to a quantitative characterization method for diagenetic seismic facies of sandstone reservoirs. Background technique [0002] Sandstone is a kind of clastic sedimentary rock. It is a rock formed by clastics through long and complicated deposition and diagenesis. It mainly contains silicon, calcium, clay and iron oxide. The rock is composed of clastics and interstitials. . In addition to quartz and feldspar, clasts also include muscovite, heavy minerals, and rock debris. The interstitial material includes two components of cement and debris matrix. Common cements include siliceous and carbonate cements; the matrix components mainly refer to finer clay or silty matter deposited with clastics. Sandstone reservoirs are rock formations that can store and infiltrate fluids, that is, reservoirs, rock formations that ...

AI Technical Summary

Problems solved by technology

[0005] The present invention finds that current research is limited to the study of diagenesis and diagenetic facies on core (rock) samples, that is, only studies the vertical diagenetic facies sequence of the sandstone reservoir of the core well. For an oil field, the core well is very Limited, the current research methods are unable to study the vertical diagenesis and diagenetic facies of non-cored sandstone reservoirs, as well as the lateral (planar) distribution and sequence of diagenetic facies in sandstone reservoirs, and cannot effectively predict the plane heterogeneity of reservoirs. It is not conducive to the scheme design and operation of oil and gas exploration and evaluation process. Therefore, the purpose of the present invention is to solve the problems of low prediction accuracy of favorable blocks, low exploration and development success rate and high exploration and development cost in the existing methods, and provide a A method for diagenetic seismic facies characterization of sandstone reservoirs

Images