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Detection method and device for effective fractured intervals in unconventional shale oil and gas reservoir

A technology for fracturing intervals and detection methods, which is applied in the fields of geological exploration and unconventional mud shale oil and gas reservoir logging

Active Publication Date: 2013-05-29
PETROCHINA CO LTD
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Problems solved by technology

[0006] In order to overcome the above-mentioned problems existing in the prior art, the embodiment of the present invention provides a detection method and device for effective fracturing intervals of unconventional mud shale oil and gas reservoirs, so as to solve the problem that there is no corresponding applicable mature technology to meet the In the exploration and development of shale oil and gas reservoirs, the actual production demand for the selection of effective fracturing intervals for fracturing stimulation

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  • Detection method and device for effective fractured intervals in unconventional shale oil and gas reservoir

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specific Embodiment

[0038] The technical solution provided by the present invention will be described in detail below in conjunction with a specific embodiment. Take the target interval of a certain research area as an example to illustrate. image 3 It is a schematic diagram of the comprehensive detection results of rock brittleness in the mud shale section of this specific embodiment.

[0039] First, according to the well's natural gamma ray curve (GR), acoustic time difference curve (DT), compensated density curve (RHOB), compensated neutron curve (NPHI), deep lateral resistivity curve (LLD), shallow lateral resistivity curve (LLS) Calculate the mineral composition profile of the well by using the optimized method, specifically including the volume content of the three mineral components of quartz (VOL_QFM), calcite (VOL_CAR), and clay (VOL_CLAY); The Poisson's ratios of the mineral components quartz, calcite, and clay in the rocks of the target layer in the research area are 0.15, 0.31, and ...

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Abstract

The invention discloses a detection method and a device for effective fractured intervals in an unconventional shale oil and gas reservoir. The method includes: collecting logging information and core sample information of intervals of interest; calculating volume contents of all minerals in rock generating the intervals of interest according to the collecting logging information and the core sample information; calculating the poisson ratio of all mineral constituents in the rock generating the intervals of interest according to the core sample information and rock space volume average elastic parameter models; calculating the fragility index of the rock generating the intervals of interest according to the volume contents of all the minerals and the poisson ratio of all the mineral constituents in the rock generating the intervals of interest; and selecting the intervals of interest with the high rock fragility index in the shale as the effective fractured intervals in the unconventional shale oil and gas reservoir. By means of the detection method and the device for the effective fractured intervals in the unconventional shale oil and gas reservoir, the actual production requirement for selecting the effective fractured intervals in exploration and development of the unconventional shale oil and gas reservoir can be met.

Description

technical field [0001] The present invention relates to the technical field of geological exploration, in particular to the logging field of unconventional mud shale oil and gas reservoirs in petroleum exploration, and specifically to a detection method for effective fracturing intervals of unconventional mud shale oil and gas reservoirs and devices. Background technique [0002] Shale oil and gas reservoirs are one type of unconventional oil and gas reservoirs. With the continuous deepening of conventional oil and gas exploration and the increasing difficulty of exploration, unconventional oil and gas resources have attracted more and more attention. Unconventional oil and gas has gradually become an important field of oil and gas exploration in my country. The proportion of unconventional oil and gas in the newly added proven oil and gas reserves Increase. In this context, it is particularly important to increase the research work on the exploration and development of unc...

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Application Information

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IPC IPC(8): E21B49/00
Inventor 李霞周灿灿赵杰李潮流王铜山程相志
Owner PETROCHINA CO LTD
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