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Method for predicting lacustrine facies ultralow-porosity permeability reservoir tight oil sweet spot region

A prediction method and technology for tight oil, applied in the field of oil and gas exploration, can solve the problems of large gaps and constraints in the geological background of tight oil, and achieve the effects of reliable technical support, strong applicability, and comprehensive interpretation.

Inactive Publication Date: 2017-03-15
PETROCHINA CO LTD
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Problems solved by technology

[0004] The geological background of tight oil in foreign countries is quite different from that in China. It is difficult to copy and apply the tight oil geological theories and prediction methods developed abroad. How to effectively and objectively predict the distribution of tight oil sweet spots in such ultra-low porosity and permeability reservoirs has become a constraint for tight oil in this area. The technical bottleneck of exploration and development, so establishing a set of prediction methods for tight oil sweet spots suitable for lacustrine ultra-low porosity and permeability reservoirs is a core issue that needs to be solved urgently

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  • Method for predicting lacustrine facies ultralow-porosity permeability reservoir tight oil sweet spot region
  • Method for predicting lacustrine facies ultralow-porosity permeability reservoir tight oil sweet spot region
  • Method for predicting lacustrine facies ultralow-porosity permeability reservoir tight oil sweet spot region

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[0037] In order to make the technical solutions and advantages of the present invention clearer, the following further describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0038] First, explain the meaning of some terms used in the present invention:

[0039] Ultra-low porosity and permeability reservoirs: According to the Petroleum and Natural Gas Industry Standard of the People’s Republic of China (SY-T6285-2009), the reservoirs with porosity of less than 5% and permeability of less than 0.1mD are defined as ultra-low porosity and permeability reservoirs.

[0040] Tight oil: It means that it is stored in the source rock in an adsorbed or free state, or interbeds with the source rock, adjacent tight sandstone, tight carbonate rock and other reservoir rocks, without large-scale long-distance migration Oil accumulation. Generally, the permeability of the matrix overburden is 0.1mD (the gas permeability is 1mD) as the upper limit ...

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Abstract

The invention discloses a method for predicting a lacustrine facies ultralow-porosity permeability reservoir tight oil sweet spot region. The method includes acquiring basic data related with hydrocarbon source rocks, reservoirs and cracks; according to the basic data, building a single-well hydrocarbon source rock TOC calculation model, a single-well reservoir parameter calculation model and a single-well crack calculation model; according to the single-well hydrocarbon source rock TOC calculation model, the reservoir parameter calculation model and the crack calculation model, calculating the values of single-well hydrocarbon source rock parameters, single-well reservoir parameters, single-well crack parameters and single-well source storage configuration parameters for each typical oil well; according to the obtained values of the single-well hydrocarbon source rock parameters, reservoir parameters, crack parameters and source storage configuration parameters, performing analysis of correlation between each parameter and accumulative output, and sensitive parameters are picked out; according to the values of the sensitive parameters in each typical oil well, obtaining a value range of the sensitive parameters in a tight oil sweet spot region; and according to the value range of the sensitive parameters and the measured values of the sensitive parameters in each position, obtaining a distribution range of the tight oil sweet spot region.

Description

Technical field [0001] The invention relates to the technical field of oil and gas exploration, and in particular to a method for predicting tight oil sweet spots in lacustrine ultra-low porosity and permeability reservoirs. Background technique [0002] With the continuous advancement and maturity of supporting technologies for exploration and development, tight oil is becoming a bright spot for global unconventional energy exploration and development. From the comprehensive analysis of total resources and supporting technologies for exploration and development, tight oil is currently the most realistic unconventional energy source, and it is an inevitable choice to accelerate the development of tight oil. Domestic tight oil exploration and development started relatively late, and eight key tight oil areas have been discovered so far, demonstrating the broad prospects of tight oil exploration and development in China. [0003] Compared with foreign tight oil, domestic tight oil h...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 黄东
Owner PETROCHINA CO LTD
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