A sedimentary body lithology identification method and system
A technology for lithology identification and sedimentary bodies, which is applied in the field of oil and gas exploration and development, can solve problems such as inability to identify lithology, and cannot promote the work stage of selection and evaluation, and achieve the effect of reducing exploration risks and overcoming ambiguity
Active Publication Date: 2019-12-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
The biggest limitation of this type of method is that the scope of lithology identification can only be limited to a single well or within the controllable range of a single well, and it is impossible to perform lithology identification on a plane or area, especially in areas without wells. identify
For exploration, this type of method can only be applied in high-exploration areas, and cannot be extended to the stage of area selection evaluation in areas without drilling constraints in the early stage of exploration
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[0036] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
[0037] Also, in the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without the specific details or in the particular manner described.
[0038] In addition, the steps shown in the flow dia...
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The invention provides a method and a system for identifying lithology of a sedimentary body. The method comprises the steps of a provenance area acquiring step, namely acquiring the provenance area of a target sedimentary body and a lithological characteristic; a geological forward model determining step, namely acquiring seismic data of the target sedimentary body, and constructing a geological forward model of the target sedimentary body according to the seismic data, the lithological characteristic of the provenance area and the seismic reflection characteristic of the target sedimentary body; and a sedimentary body lithology determining step, namely determining the lithology of the target sedimentary body according to the geological forward model. The method has advantages of maximally overcoming ambiguity in sedimentary body lithology interpretation caused by no well region geomorphology, laying a solid basis and supplying an important insurance for oil gas exploration, and reducing an exploration risk caused by lithology interpretation errors.
Description
technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a sedimentary body lithology identification method and system. Background technique [0002] Deep water deposition has increasingly become a hotspot for exploration, and it has also been the main field for increasing global oil and gas reserves and production in the past two decades. However, deep-water sedimentary drilling costs are high and exploration risks are high, especially the identification of lithology has become the key to exploration. [0003] In the prior art, lithology is usually identified by applying conventional logging under drilling constraints. At the same time, there are also some improved methods, for example, some methods are based on the analysis of drilling and logging, applying various mathematical statistical methods to realize lithology identification. Moreover, with the continuous improvement of logging methods, some ...
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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/306G01V2210/624G01V2210/66
Inventor 赵永强罗宇王斌周雨双田蜜顾忆李群
Owner CHINA PETROLEUM & CHEM CORP