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Exploration potential planar partitioning method and device for lacustrine facies shale oil

A shale oil and shale technology, which is applied in the field of lacustrine shale oil exploration potential plane division, can solve problems such as low accuracy and underground real state error

Active Publication Date: 2019-11-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accuracy of this evaluation method is low, and there are large errors between the evaluation results and the real state of the ground

Method used

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  • Exploration potential planar partitioning method and device for lacustrine facies shale oil
  • Exploration potential planar partitioning method and device for lacustrine facies shale oil
  • Exploration potential planar partitioning method and device for lacustrine facies shale oil

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Effect test

Embodiment 1

[0031] see figure 1 , which is a schematic flowchart of a planar partitioning method for the exploration potential of lacustrine shale oil provided by an embodiment of the present invention, consisting of figure 1 Visible, this method comprises the following steps:

[0032] Step S102: Obtain the content of hydrocarbon-generating components in the target shale oil formation and the hydrocarbon production rate of the hydrocarbon-generating components at each evolution stage, the organic matter abundance, crude oil density, shale porosity and Ineffective porosity of shale, and the sedimentary age of the oil group in the target shale oil formation, and the structural contour data of the target shale oil formation corresponding to the sedimentary age.

[0033] For the target shale oil formation, there are usually many kinds of hydrocarbon-generating components, and the hydrocarbon production rate of each hydrocarbon-generating component is usually different in each evolution stage...

Embodiment 2

[0111] In order to understand more clearly the plane zoning method for the exploration potential of lacustrine shale oil, this example introduces an application example, and the specific steps are as follows.

[0112] 1) Quantitatively evaluate the oil-generating capacity of shale according to hydrocarbon-generating components, abundance and maturity.

[0113] ① Shale oil production calculation.

[0114] The microscopic components of shale kerogen in the target layer mainly include planktonic algae, sapropel amorphous, cutin, sporopollenon, humic amorphous, hydrogen-rich vitrinite, and normal vitrinite. According to the characteristics of hydrocarbon generation, the kerogen components are divided into sapropetic group, exinite group and vitrinite group. Among them, the kerogen components in the same group have similar hydrocarbon generation evolution characteristics, and the hydrocarbon generation differences between different groups are quite large. The identification result...

Embodiment 3

[0146] This embodiment also provides a lacustrine shale oil exploration potential plane division device, such as Figure 5 Shown, which is a schematic diagram of the structure of the device, by Figure 5 It can be seen that the device includes a parameter acquisition module 51 connected in sequence, a unit mass shale oil production volume calculation module 52, a maturity zone determination module 53, a cumulative structural complexity index calculation module 54, a structural zone determination module 55, and an exploration potential plane zone determination module. Module 56, wherein, the function of each module is as follows:

[0147] The parameter acquisition module 51 is used to obtain the content of hydrocarbon-generating components in the target shale oil formation, the hydrocarbon production rate of the hydrocarbon-generating components at each evolution stage, the organic matter abundance of the target shale oil formation, crude oil density, shale Porosity, shale inv...

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Abstract

The invention provides an exploration potential planar partitioning method and device for lacustrine facies shale oil. The exploration potential planar partitioning method comprises the steps that thecontent of hydrocarbon generation components in a target shale oil formation, the hydrocarbon yield of the hydrocarbon generation components at all evolution stages, the organic matter abundance, crude oil density, shale porosity and shale invalid porosity of the target shale oil formation, the age of deposition of oil groups in the target shale oil formation and structure contour data, corresponding to the age of deposition, of the target shale oil formation are obtained; the oil production volume of shale in unit mass is calculated; maturity partitions of the target shale oil formation aredetermined; the diagenesis index, the horizontal stress index and the vertical stress index are calculated; then the cumulative structure complexity index is calculated; structure partitions of the target shale oil formation are determined; and exploration potential planar partitions of the target shale oil formation are determined according to the maturity partitions and the structure partitions.According to the exploration potential planar partitioning method, the exploration potential evaluating precision of the lacustrine facies shale oil is improved, and an evaluation result is closer tothe underground real state.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method and a device for subdividing the exploration potential plane of lacustrine shale oil. Background technique [0002] Shale oil is an important type of unconventional oil and gas resources. It is the oil resources contained in shale-dominated shale formations, including oil in shale pores and fractures, and clastic rocks or carbonate rocks. Petroleum in adjacent and interlayer layers. In recent years, major breakthroughs have been made in several continental shale oil blocks, showing good industrial prospects. Among them, the continental lake basin has the characteristics of complex structure, diverse depositional environment, complex shale composition, rapid lithology change, and diverse organic matter components. [0003] Shale is a source rock with certain storage performance, and has the characteristics of source-reservoir integration. The generated oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00G01V9/00
CPCE21B49/00G01V9/00
Inventor 周立宏陈长伟杨飞
Owner PETROCHINA CO LTD
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