A method and device for determining a shale gas stratum structure model
A structural model and shale gas technology, applied in seismology for well logging records, etc., can solve the problems of low precision of stratigraphic structure models, less logging data, and inaccurate seismic interpretation data constraints, etc., to achieve precise constraints, The effect of improving accuracy
Active Publication Date: 2019-02-15
PETROCHINA CO LTD
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Problems solved by technology
[0006] The inventors have found at least the following problems in the prior art: For shale gas work areas with few vertical wells, there are few vertical well logging data available, which may lead to inaccurate constraints on the seismic interpretation data of the target interval, which may lead to The established stratigraphic structure model of the entire target layer has low accuracy
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[0062] Embodiments of the present application provide a method and device for determining a shale gas formation structure model.
[0063] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0064] figure 1 It is a flow chart of an embodiment of a method for determining a shale gas formation structure model in the present application. Such as figure 1 As shown, the method for determining a shal...
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The embodiments of the application disclose a method and a device for determining a shale gas stratum structure model. The method comprises the following steps: acquiring logging data of horizontal wells of a drilling interval of interest and logging data of vertical wells of the drilling interval of interest; determining the association relationship between the stratum type of each stratum in the interval of interest and the logging data corresponding to each stratum based on the logging data of the vertical wells; determining the stratum type of each stratum in the drilling interval of the horizontal sections of the horizontal wells based on the logging data of the horizontal wells and the association relationship, and determining the top position of each stratum in the drilling interval of the horizontal sections of the horizontal wells based on the logging data of the horizontal wells; determining the thickness distribution information of each stratum in the interval of interest; and determining a 3D stratum structure model of the interval of interest according to the thickness distribution information of each stratum in the interval of interest and the stratum type and top position of each stratum in the drilling interval of the horizontal sections of the horizontal wells. The precision of the stratum structure model determined can be improved.
Description
technical field [0001] The present application relates to the technical field of oil and gas development, in particular to a method and device for determining a shale gas stratum structure model. Background technique [0002] A horizontal well refers to a well in which the inclination angle reaches or is close to 90 degrees and the wellbore is drilled for a certain length along the horizontal direction. The wellbore of a horizontal well can generally extend horizontally in the reservoir for a considerable length. Sometimes for some special needs, the inclination angle can exceed 90 degrees. [0003] With the continuous improvement of oilfield drilling level and development technology, horizontal wells are widely used in the development of complex oil and gas reservoirs such as tight oil and gas and shale gas, as well as the excavation of remaining reserves in old work areas to reduce development costs and increase single well productivity. For example, most of the wells dr...
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IPC IPC(8): G01V1/40
CPCG01V1/40
Inventor 乔辉贾爱林位云生何东博贾成业韩品龙李易隆金亦秋袁贺朱汉卿
Owner PETROCHINA CO LTD