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Method for exquisitely depicting and predicting edge structures of carbonate platforms

A prediction method and technology of carbonate rocks, applied in geophysical surveying, seismology, measuring devices, etc., can solve the problem of vertical superposition relationship and its plane distribution, which are rarely studied, restricted by the study of reef-shoal reservoirs, Lack of fine anatomy of the internal structural characteristics of the platform margin zone to achieve good application effects and promotion prospects, optimize the platform evolution model, and enhance the effect of operability

Inactive Publication Date: 2019-04-09
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0003] However, most of the current research results focus on the whole carbonate rock platform in different periods, discuss the types of platform margins, analyze the platform structure styles in different regions, and lack the fine dissection of the internal structural characteristics of platform margin belt strata in different regions and different periods; Most of the studies on beach reservoirs focus on the analysis of reservoir physical properties and controlling factors, but there are few studies on the vertical superposition relationship and plane distribution of platform margin reefs, beaches or reef-bank complexes.
These current conditions restrict the research on reef-shoal reservoirs at platform margins

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  • Method for exquisitely depicting and predicting edge structures of carbonate platforms
  • Method for exquisitely depicting and predicting edge structures of carbonate platforms
  • Method for exquisitely depicting and predicting edge structures of carbonate platforms

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[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. The exemplary embodiments and their descriptions are only used to explain the present invention, not to limit the present invention.

[0028] In a research area of ​​an oilfield in western China, carbonate platforms are widely developed, with a large age span, large thickness, and wide distribution. The platform structure is difficult to describe and predict finely, which has become an important problem in the practice of exploration and development. Taking the research on fine characterization and prediction of carbonate platform structure as an example, the technical solution of the present invention will be further described in detail.

[0029] This embodiment provides a fine description and prediction method of carbonate platform structure, which includes the following steps, such as figure 1 Shown:

[0030] Step S1: Establish a high-resolution seq...

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Abstract

The invention provides a method for exquisitely depicting and predicting edge structures of carbonate platforms. The method comprises the steps of: establishing a high-resolution sequence stratigraphic framework through well-seismic combination; recovering an ancient landform according to a stratum residual thickness map and determining a development position of a platform edge; exquisitely dissecting the platform edge by utilizing seismic data, establishing development modes of different platform edge zones at different periods, and analyzing a development issue and a superposition style of areef flat body; determining plane distribution characteristics of the platform edge and development issue and scale of the reef flat body therein, and delimiting a beneficial reef flat development zone of the platform edge zone; and forwardly modeling the growth of a platform by using geological software, and optimizing a prediction result. The method for exquisitely depicting and predicting edgestructures of carbonate platforms is mainly based on a sedimentology theory and a sequence stratum theory, and is capable of carrying out exquisite dissection on platform edge structures and predicting distribution positions beneficial for reef flat bodies by sufficiently utilizing outcrop, seismic and drilling data, thereby improving the exquisite degree of platform structure depiction.

Description

technical field [0001] The invention relates to the field of reservoir prediction for petroleum and natural gas geological exploration and development, in particular to a method for finely describing and predicting the edge structure of a carbonate rock platform. Background technique [0002] The organic reef-shoal reservoir at the edge of the platform is a favorable carbonate oil and gas exploration area, and the recoverable reserves in the world reach 1000×10 4 m 3 More than half of the oil and gas reservoirs are platform margin high-energy reef-shoal reservoirs. These discoveries indicate that reef-shoal facies reservoirs at the margin of carbonate platforms have good exploration potential. With the first breakthrough of platform margin reservoirs and oil and gas reservoirs in the middle Ordovician Jianfang Formation in the Tahe Oilfield of the Tarim Basin, and oil and gas discoveries made in drilling wells at the platform margins of the Tarim Basin in recent years, carb...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/302
Inventor 高志前樊太亮张岩商雅欣
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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