Quantitative prediction method of cemented porosity reduction in clastic rock reservoirs

A prediction method and clastic rock technology, applied in prediction, data processing applications, instruments, etc., can solve problems such as difficulty in cementation amount and weak cementation strength of clastic rock reservoirs, and achieve the effect of reducing exploration and development costs.

Active Publication Date: 2021-10-29
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the diagenetic process, there are more or less cementation types, different cementation times, and stronger or weaker cementation strengths, so it is very difficult to quantitatively predict the amount of cementation in clastic rock reservoirs.

Method used

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  • Quantitative prediction method of cemented porosity reduction in clastic rock reservoirs
  • Quantitative prediction method of cemented porosity reduction in clastic rock reservoirs
  • Quantitative prediction method of cemented porosity reduction in clastic rock reservoirs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] A quantitative prediction method for cemented porosity reduction, comprising the following steps:

[0122] 1) Collect geological data in the study area, which includes:

[0123] ①Study result map of sedimentary facies of the target layer in the study area;

[0124] ② Contour map of target layer interface structure;

[0125] ③ Contour map of the interface structure of the overlying strata on the target layer;

[0126] ④Reservoir physical property data in the study area;

[0127] ⑤Reservoir single well diagenesis data in the study area;

[0128] ⑥Diagenetic evolution sequence in the study area;

[0129] ⑦The burial history and thermal evolution history of the study area;

[0130] 2) Establish the original data database

[0131] (1) Sedimentary facies type database F_m

[0132] The sedimentary facies types of clastic rock reservoirs are summarized and classified, including: alluvial fan-dry fan-root F_1, alluvial fan-dry fan-middle F_2, alluvial fan-dry fan-edge F_3...

Embodiment 2

[0214] Based on the quantitative prediction method of cemented porosity reduction of clastic rock reservoirs above, the reservoirs of the second member of Dongying Formation in Bozhong sag are predicted, and the specific steps are as follows:

[0215] 1. Collect geological data in the study area

[0216]The geological data of the second member of the Dongying Formation in the Bozhong Sag were collected, and various types of data were classified according to the original data database. The collected geological data include the following contents: Sedimentary Facies Map of the Second Member of Dongying Formation, Lithology Map of the Second Member of Dongying Formation, Fracture Distribution Map of the Second Member of Dongying Formation, pH Map of the Second Member of Dongying Formation, The diagenetic stage diagram of reservoirs in the first member, and the sedimentary cycle diagram of reservoirs in the second member of Dongying Formation (such as figure 2 , 4 ~8 described)...

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Abstract

The invention discloses a quantitative prediction method for the cemented porosity reduction of clastic rock reservoirs. The method checks the key geological factors and their differences in different geological processes and the influence of various geological factors in different geological processes on the cemented porosity reduction of reservoirs. Construct the pore response quantitative equation, simulate the reservoir pore evolution process according to the quantitative response equation, reproduce the influence of cementation on the physical properties of the reservoir during the diagenesis process of sediment burial, and be able to quantify the porosity reduction of clastic rock cementation In order to provide new ideas and basis for the study of basin reservoir physical properties.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a quantitative prediction method for cemented porosity reduction of clastic rock reservoirs. Background technique [0002] During the diagenesis process of sediment burial, the rock volume and pore space gradually shrink, and the rock becomes more and more compact. The compaction is the main factor controlling the reservoir performance of sandstone, and the porosity reduction caused by compaction accounts for Most of the total pore volume of the layer is lost, thus greatly affecting the reservoir properties of the sand body. [0003] Cementation is a change in sediments during diagenesis, in which the precipitation of crystals from pore solution binds loose grains together and consolidates diagenesis. Common cements are muddy, iron, siliceous and calcareous. In reservoir evolution, cementation is one of the main reasons for the reduction of prima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 钱文蹈尹太举张昌民侯国伟何苗马嘉令赵晓悦杨兰蒋蕾唐慧佳
Owner YANGTZE UNIVERSITY
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