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Method for quantitatively expressing diagenetic logging facies of sandstone reservoir

A quantitative characterization and logging facies technology, which is applied in the field of oil and gas exploration and development design in sandstone reservoirs, can solve the problems of favorable block prediction accuracy, low exploration and development success rate, and high exploration and development costs, so as to improve prediction accuracy, improve Evaluate efficiency and improve the effect of success rate

Inactive Publication Date: 2014-06-18
YANGTZE UNIVERSITY
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for quantitative characterization of diagenetic logging facies in sandstone reservoirs, aiming to solve the problems of low prediction accuracy of favorable blocks, low success rate of exploration and development, and high cost of exploration and development in existing methods

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  • Method for quantitatively expressing diagenetic logging facies of sandstone reservoir

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Embodiment 1

[0035] Embodiment 1: concrete steps are:

[0036] Step 1: In the same oil and gas exploration and development block, according to geological conditions and research objectives, core wells in different sedimentary microfacies blocks are selected to form sample collection and observation points. For example, a sandstone reservoir in a certain research area has sedimentary microfacies development There are underwater distributary channels, mouth bars, sheet sand, etc., and there are core samples in each microfacies, and sandstone samples required for experimental analysis and testing are collected from these samples; systematically observe and describe the cores of coring wells , to determine the sedimentary microfacies type and sequence of the sandstone reservoir;

[0037] Step 2: Use geochemical, X-ray diffraction and other experimental equipment to test the content of clay minerals, quartz, feldspar, and carbonate rocks in the collected sandstone samples by sedimentary microfa...

Embodiment 2

[0045] Embodiment 2, concrete steps of the present invention are:

[0046] The first step is to systematically observe and describe the core data of all coring wells in the research area, determine the sedimentary microfacies type and sequence of the sandstone reservoir, and carry out systematic sampling according to the conventional core analysis test sampling standard and the standard of the present invention;

[0047] In the second step, the collected sandstone samples are divided into sedimentary microfacies to test the content of clay minerals, quartz, feldspar, carbonate rocks, etc., and obtain relevant index data of sandstone samples;

[0048] In the third step, the collected sandstone samples are subjected to microscopic thin section, scanning electron microscope, cathodoluminescence and other tests to obtain the contact relationship between sandstone particles, clay minerals, cement, dissolution and other micro-related index data reflecting diagenesis;

[0049] The fo...

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Abstract

The invention discloses a method for quantitatively expressing diagenetic logging facies of a sandstone reservoir. The method for quantitatively expressing the diagenetic logging facies of the sandstone reservoir can used for accurately evaluating a longitudinal phase sequence of diagenetic facies of a non-coring well sandstone reservoir, and plane distribution and principle of diagenetic facies of a target stratum reservoir by utilizing quantitative indexes of typical stone electrical parameters for reflecting diagenetic characteristics and environment of the sandstone reservoir, so as to provide effective technical information for the exploration and development of oil and gas of sandstones; a favorable block for the exploration and development of the oil and gas of the sandstones is preferably selected, so that the predication accuracy of the favorable block is improved, the success rate of the exploration and development is improved and the cost of the exploration and development is reduced.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration, development and design of sandstone reservoirs, and in particular relates to a method for quantitative characterization of sandstone reservoir diagenetic logging facies. 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 ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 胡望水李涛李相明雷中英邢翔李松泽胡志鹏江舟陈雷黄鑫
Owner YANGTZE UNIVERSITY
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