Method and device for predicting oil-gas effective reservoir in sandstone

A reservoir prediction and sandstone technology, applied in the field of petroleum exploration, can solve the problems of inaccurate prediction of sandstone reservoir boundary and unsatisfactory reservoir prediction.
CN112711068APending Publication Date: 2021-04-27CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2021-04-27

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Abstract

The invention relates to a method and device for predicting an oil-gas effective reservoir in sandstone. The method comprises the steps: recognizing a sandstone development region through the root-mean-square amplitude attribute of post-stack seismic data; recognizing pore sandstone development area with a certain pore scale in the sandstone development area through intersection inversion of natural gamma frequency division and longitudinal wave impedance, wherein the recognition precision is high; and finally carrying out oil-gas detection on the pore sandstone development area with a certain pore scale by utilizing the characteristics of low-frequency increase and high-frequency attenuation of the oil gas, and predicting the distribution area of the oil-gas effective sandstone, so that the distribution range of the sandstone oil-gas effective reservoir is finely described, sandstone porosity prediction from sandstone reservoir prediction is realized, oil and gas content detection is gradually deepened, and the prediction precision of sandstone oil and gas effective reservoirs is improved.
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Description

technical field

[0001] The invention relates to the technical field of petroleum exploration, in particular to a method and device for predicting effective oil and gas reservoirs in sandstone. Background technique

[0002] At present, sandstone reservoir prediction techniques mainly include three categories: seismic facies analysis, seismic attribute analysis and seismic inversion. Prediction of effective sandstone refers to the further prediction of porosity and oil-gas content of sandstone on the basis of sandstone prediction, so as to find oil-bearing sand bodies with certain storage space. "Research on Earthquake Prediction Technology for Effective Reservoirs of Beach Bar Sandstone in Qingnan Subsag" proposes that on the basis of signal separation and reconstruction technology to improve the resolution of seismic data in existing research, multiple parameters such as reservoir physical properties, electrical properties, and seismic attributes are used to establish and T...

Claims

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