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Method and system for predicting formation pressure of exploratory wells

A technology of formation pressure and pressure, applied in the field of oil and gas geophysical exploration, can solve problems such as difficulty in obtaining pressure prediction results, and achieve the effect of improving prediction accuracy

Active Publication Date: 2021-09-28
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] Different types of reservoirs are developed, and the causes of formation pressure anomalies are different, so it is difficult to obtain reliable pressure prediction results by using the same pressure prediction model

Method used

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  • Method and system for predicting formation pressure of exploratory wells
  • Method and system for predicting formation pressure of exploratory wells
  • Method and system for predicting formation pressure of exploratory wells

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Embodiment Construction

[0050] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0051] The invention provides a method for predicting the formation pressure of an exploration well, the method comprising:

[0052] Calculate the untested rock density curve of shallow well logging and splicing it with the density curve obtained from well logging to obtain the density curve ρ(d) from the surface to the deep reservoir section;

[0053] Calculate overlying formation pressure SV(d) and hydrostatic pressure Phy(d);

[0054] C...

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Abstract

The present invention proposes a method and system for predicting formation pressure in exploratory wells. The method includes calculating untested rock density curves in shallow well logging and splicing them with density curves obtained from well logging to obtain the section from the surface to deep reservoirs. density curve ρ(d); calculate the overlying formation pressure SV(d) and hydrostatic pressure Phy(d); calculate the formation pressure of the shallow clastic rock formation; calculate the formation pressure of the gas-bearing shale reservoir; The formation pressure of the salt rock reservoir; based on the results calculated in the above steps, the final logging profile for pressure prediction is obtained. By adopting different pressure prediction models for different lithologies, the accuracy of logging formation pressure prediction can be effectively improved.

Description

technical field [0001] The invention relates to the field of oil and gas geophysical exploration, in particular to a logging prediction method and a prediction system for formation pressure in different lithologic formations. Background technique [0002] Under the current technical conditions, well logging data reflect the most detailed formation information. Since the well logging data are directly taken from the inside of the formation, they also have the advantages of good vertical continuity, high resolution and high data reliability, so they can be more directly and more accurately. Truly reflect the situation of the stratum. However, the sound velocity, density, resistivity and other parameters of the formation have a certain relationship with the formation pore pressure, showing a certain regularity. Therefore, the formation pore pressure can be predicted based on these logging data of the formation. From the perspective of practical application, the logging data f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/02G06Q10/04G06F30/20G06F119/14
CPCG06Q10/04G06Q50/02G06F30/20
Inventor 胡华锋林正良胡起杨丽
Owner CHINA PETROLEUM & CHEM CORP
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