Method for predicting high-quality reservoir in gravity flow channel sand

A prediction method and flow channel technology, applied in the field of petroleum geological engineering, can solve the problems of blind drilling operations, low drilling success rate, and inability to quantitatively distinguish high-quality reservoirs from poor reservoirs, so as to overcome blindness and improve drilling success. rate effect

Inactive Publication Date: 2017-05-31
PETROCHINA CO LTD
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Problems solved by technology

[0005] Existing technologies can only distinguish reservoirs, but cannot quantitatively distinguish high-quality reservoirs from poor reservoirs. At the same time, there is currently no effective method for predicting high-quality reservoirs in gravity flow channel sand bodies, and drilling operations are relatively blind , low drilling success rate

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  • Method for predicting high-quality reservoir in gravity flow channel sand

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Embodiment Construction

[0028] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0029] The invention provides a method for predicting high-quality reservoirs of gravity flow channel sand body, see figure 1 , the method includes the following steps:

[0030] Step 101: Obtain the logging data of the gravity flow channel sand bodies of multiple single wells, and obtain the porosity Φ, rock density and compressional wave velocity V corresponding to the gravity flow channel sand bodies of each single well;

[0031] According to the logging data of the drilled single well (including the acoustic time difference Δt, etc.), the porosity Φ and the compressional wave veloc...

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Abstract

The invention discloses a method for predicting high-quality reservoir in gravity flow channel sand and relates to the field of petroleum geological engineering. The method comprises steps as follows: well logging data of gravity flow channel sand in multiple single wells are obtained, and the porosity, the rock density and the longitudinal wave velocity of corresponding gravity flow channel sand in each single well are obtained; corresponding wave impedance of gravity flow channel sand in each single well is further obtained; a porosity-wave impedance interactive chart is established on the basis, and the high-quality reservoir in the gravity flow channel sand is determined according to the chart; wave impedance inversion is performed on target gravity flow channel sand reservoir, and quantitative distribution of the target gravity flow channel sand reservoir is obtained in combination with information of the high-quality reservoir, determined according to the porosity-wave impedance interactive chart, of the gravity flow channel sand. By means of the predicting method, distribution of high-quality reservoir of the gravity flow channel sand can be quantitatively predicted, the blindness of well drilling is eliminated, and the success rate of well drilling is increased.

Description

technical field [0001] The invention belongs to the field of petroleum geological engineering, in particular to a method for predicting high-quality reservoirs in gravity flow channel sand bodies. Background technique [0002] In the continental basins in eastern China, gravity flow channel sand bodies are widely distributed. Since gravity flow is a high-density fluid flow in which the sediment-fluid mixture moves down the slope as a whole under the action of gravity and is mainly transported in a suspended manner, its formation belongs to event deposition. Such as paroxysmal factors directly or indirectly induce the sliding of sediments to form gravity flow deposition. In the gravity flow channel sand body, the clastic particles are mixed in size, poorly sorted, and the physical properties of the reservoirs vary greatly. It is difficult to predict high-quality reservoirs by using seismic data. [0003] At present, petroleum geologists at home and abroad generally use seis...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40G01V1/50
CPCG01V1/40G01V1/50G01V2210/624
Inventor 袁淑琴熊金良周立宏祝文亮肖敦清柴公权饶敏孔德博周淑慧朱伟峰牟连刚陈璞
Owner PETROCHINA CO LTD
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