A method for selecting target windows in shale gas horizontal wells
A technology for horizontal wells and shale gas, applied in earthwork drilling, wellbore/well components, data processing applications, etc. It can solve problems such as large differences in location selection, objective evaluation of single well productivity control factors, and difficulty , to achieve the effect of increasing single well production
Active Publication Date: 2020-06-30
CHINA PETROLEUM & CHEM CORP +1
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However, at present, there are large differences in the selection of target window positions for shale gas horizontal wells in Sinopec Jiaoshiba, PetroChina Weiyuan-Changning, and Sinopec Weiyuan and Yongchuan blocks: PetroChina Weiyuan-Changning and Longmaxi III Natural Gamma Peak It is the target window of the horizontal well. In the Yongchuan block of Sinopec, the natural gamma ray peak No. 1 of the Longmaxi Formation is used as the target window of the horizontal well. Horizontal well target windows, it can be seen that there are many options for target windows, and it is difficult to form a unified plan. Even a block has a variety of target window options, which makes it difficult to objectively evaluate the productivity of a single well under the constraints of the same scale. controlled factors
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Embodiment 1
[0022] Embodiment 1: as figure 1 As shown, a method for selecting a target window in a shale gas horizontal well provided in this embodiment includes the following steps:
[0023] S100: According to the development of lamina with different morphological characteristics, according to the size of lamina spacing and the content of dark minerals that make up the lamina, divide the target shale core lamina into multiple lamina by millimeter-level description There are obvious differences in lamina spacing, lamina combination style, and hydrodynamic conditions between lamina groups, which in turn affect the characteristics of lamina reservoirs; specifically, in this step, the division of well logging sublayers, core The fine description and rock-electricity relationship are used to divide the lamina groups.
[0024] S200: Perform log interpretation of shale geological parameters for the lamina group in step S100 (relevant parameters are mainly TOC, gas content, porosity, brittlenes...
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The invention relates to the field of petroleum and natural gas exploration and development, in particular to a marine-facies shale gas horizontal well target window selection method. On the basis ofhigh-quality shale section fine layer division (I-III peaks), the shale gas horizontal well target window selection method is obtained through reservoir static parameter fine evaluation and engineering rock mechanics experiment and calculation according to drilled shale gas horizontal well oil-gas display conditions and fractured horizontal well production logging interpretation results, reasonable horizontal well passing positions in a certain section can be estimated objectively and accurately, and single-well yield is increased to the maximum extent.
Description
technical field [0001] The invention relates to the field of petroleum and natural gas exploration and development, in particular to a method for selecting a target window of a marine shale gas horizontal well. Background technique [0002] In the past ten years, China's shale gas development has gradually formed a set of development paths that adapt to the characteristics of China's shale gas, from the early learning and reference of shale gas development experience in North America to gradually combining the special geological and engineering conditions of China's shale gas regions. A number of shale gas development test areas have been successively established in Fuling Jiaoshiba, Weiyuan-Changning and other areas. At present, the ambitious goal of producing 6.5 billion cubic meters of natural gas formulated in the "Twelfth Five-Year Plan" development plan has been exceeded. At present, shale gas accumulation geological theory, evaluation of shale gas area selection, comp...
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IPC IPC(8): E21B47/00E21B43/25G06Q50/02
Inventor 熊亮葛忠伟史洪亮苏锦义张克银魏力民王同董晓霞王岩张天操
Owner CHINA PETROLEUM & CHEM CORP