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Continental lacustrine basin slope area stratum lithologic oil and gas reservoir dominant facies prediction method

A technology of formation lithology and prediction method, applied in the field of petroleum exploration, can solve the problems of large production difference and low oil and gas abundance

Inactive Publication Date: 2017-08-15
DAGANG OIL FIELD OF CNPC
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Problems solved by technology

However, due to the strong concealment of stratigraphic-lithological oil and gas reservoirs in the slope area, the oil and gas abundance is generally low, and the production varies greatly, which has always been a difficulty in the field of oil exploration

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  • Continental lacustrine basin slope area stratum lithologic oil and gas reservoir dominant facies prediction method
  • Continental lacustrine basin slope area stratum lithologic oil and gas reservoir dominant facies prediction method

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Embodiment Construction

[0043] The method for predicting the dominant facies of stratum-lithological oil and gas reservoirs in the continental lake basin slope area described in the present invention will be further elaborated below in conjunction with specific examples, so as to help those skilled in the art to have a more complete and accurate understanding of the inventive concepts and technical solutions of the present invention And in-depth understanding; It should be pointed out that the relevant descriptions in the embodiments are all exemplary, not intended to limit the scope of protection of the invention.

[0044] The method for predicting dominant facies of lithologic oil and gas reservoirs in this embodiment includes the following steps:

[0045] 1) Quantitative determination of slope zones by three elements

[0046] ① Burial depth: Burial depth controls the change of formation temperature and pressure, and different temperature and pressure environments form different diagenetic products...

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Abstract

The invention relates to a continental lacustrine basin slope area stratum lithologic oil and gas reservoir dominant facies prediction method and belongs to the petroleum exploration technical field. The method comprises the following steps that: 1) a slope type is determined through three-element quantitative analysis, namely, buried depth analysis, depositional environmental analysis and hydrocarbon source maturity; 2) single-factor condition depiction is performed on reservoir dominant transport facies, dominant structure facies, dominant diagenetic facies and dominant source rock facies which control oil and gas accumulation conditions; and 3) as for different slope types, overlay analysis is performed to determine the dominant facies of each slope type and determine the development areas of the dominant facies. The prediction method of the present invention is suitable for continental lacustrine basin slope area stratum lithologic oil and gas reservoir exploration, seek and discover dominant facies so as to provide a basis for efficient well location deployment and provide technical support for the discovery of efficient reserve areas.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, more specifically, the invention relates to a method for predicting dominant facies of strata-lithological oil and gas reservoirs in the continental lacustrine basin slope area. Background technique [0002] With the deepening of exploration, the stratigraphic-lithologic reservoirs in the slope area have been paid more and more attention by exploration technicians because of their wide distribution area and large resource scale, and have become an important field for increasing reserves and production at present and in the future. However, due to the strong concealment of stratigraphic-lithological reservoirs in the slope area, the overall abundance of oil and gas is relatively low, and the production varies greatly, which has always been a difficulty in the field of petroleum exploration. In view of the above problems, the present invention aims to summarize a set of prediction met...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 周立宏蒲秀刚陈长伟肖敦清姜文亚韩国猛王振升李洪香牟智全邹磊落
Owner DAGANG OIL FIELD OF CNPC
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