Comprehensive evaluation method for single well oil gas geology

A comprehensive evaluation, oil and gas technology, applied in earthwork drilling, wellbore/well components, etc., can solve problems such as immature oil and gas evaluation methods in shale

Inactive Publication Date: 2016-02-03
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0003] Shale oil and gas reservoirs belong to the category of unconventional oil and gas reservoirs, but they are different from tight sandstone oil and gas reservoirs. The biggest difference lies in the integration of source and storage. Therefore,

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Embodiment Construction

[0018] A single well oil and gas geological comprehensive evaluation method, comprising the following steps:

[0019] 1) Evaluation of source rocks: Sampling and testing the shale at equal intervals in the FE section, the middle part of the FSH section and the upper part of the FS section of the source rock, and comparing the test analysis results with the geochemical logging analysis results;

[0020] 2) Reservoir evaluation: Carry out coring analysis on the sand group below the oil-bearing layer, use ordinary thin section and whole rock data analysis, and perform triangular end member projection according to the standard sandstone classification scheme of China National Petroleum Corporation, and measure the coring The main content of feldspar sandstone and feldspar in the section;

[0021] 3) Caprock evaluation: select parameters such as porosity, caprock thickness, single layer thickness, muddy land and depositional environment to calculate the parameter index of caprock s...

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Abstract

The invention relates to a comprehensive evaluation method for single well petroleum geology. The method comprises the following steps: 1, source rock evaluation; 2, reservoir stratum evaluation; 3, overlying stratum evaluation; 4, entrapment evaluation; 5, oil gas source comparison. According to the comprehensive evaluation method for the single well oil gas geology, the sequence stratigraphy theory serves as guidance, systematic observation of rock debris and the core and sample analysis serve as the bases, physical geography materials such as logging are combined, system partitioned strata are compared with adjoining wells, target stratum series sedimentary facies markers, sedimentary facies types and characteristics, stratigraphic sequence characteristics and sedimentary cycles, structures and structural characteristics are researched, sedimentary facies, cored interval sedimentary microfacies and comprehensive logging interval sedimentary microfacies are partitioned, sedimentary environment analysis is conducted, a single well facies model and whole well sedimentary facies sections are established, the mutual relations between the sedimentary facies and a crude stratum, a reservoir stratum and an overlying stratum are defined, and outlining basis is provided for conducting single well oil gas geology basic element analysis.

Description

technical field [0001] The invention relates to a single well oil and gas geological comprehensive evaluation method. Background technique [0002] Subei Basin is a Mesozoic and Cenozoic fault-depression basin. The pre-Jurassic basement is composed of Indosinian-Yanshanian folded Paleozoic and Triassic strata. The formation and development of the basin experienced a depression period-fault depression There are five depositional stages: stage-rifting stage-turning stage-depression stage. The Mesozoic and Cenozoic sedimentary rock series developed in the FE sub-sag in the basin, with a sedimentary thickness of up to 5200 km. From bottom to top, the main deposits filled the Upper Cretaceous Pukou Formation (K2p), Chishan Formation (K2c), Paleogene Taizhou Formation ( E1t), Funing Formation (E1f), DN Formation (part of E2d), SD Formation (E2s), Neogene Yancheng Formation (Ny) and Quaternary DT Formation (Qd). Stratum deposition was controlled by tectonic movements. After the Y...

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Application Information

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IPC IPC(8): E21B49/00
Inventor 霍飞张伟姚磊季哲林琳杨浩邵江
Owner SOUTHWEST PETROLEUM UNIV
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