Biological reef-beach identified seismic interpretation method
A technology of seismic interpretation and biological reefs, applied in the field of seismic interpretation to identify biological reefs and flats, can solve problems such as difficulties, difficult identification of reefs and flats, insufficient deployment, etc., and achieve good results
Inactive Publication Date: 2019-12-17
BGP OF CHINA NAT GASOLINEEUM CORP
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Problems solved by technology
Regardless of the identification method, since the seismic section is a comprehensive reflection feature of underground rock formations and geological bodies, it has a certain degree of multi-solution, and it is obviously not sufficient for the deployment of well locations in the process of oil and gas exploration.
It can be seen that the identification of reef flats is relatively difficult, and it is even more difficult to find effective reservoirs in reef flats rich in oil and gas reservoirs.
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[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] The present invention provides a kind of preferred embodiment:
[0031] On the basis of clarifying the "five major response characteristics" of reef geophysics, the "three anomalies" identification methods of reef earthquakes are summarized, namely "abnormal reflector characterization technology", "abnormal time difference identification technology" and "abnormal amplitude prediction technology". ";
[0032] Specifically, by using a variety of s...
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The invention relates to the technical field of oil exploration, in particular to a biological reef-beach identified seismic interpretation method. The method comprises the following steps: an abnormal reflector depicting technology, in which a one-dimensional plane point segment representing an abnormal reflector of a biological reef is finely depicted by means of a plurality of seismic attributes; and an abnormal time difference recognition technology, in which variable-speed mapping is realized by using the characteristic that the time difference between top face reflection of biological reef and an seismic TC2 sign reflection layer is low in abnormity, and two-dimensional plane distribution of the reef is realized preliminarily. On the basis of comprehensive logging-geology-seismic data analysis, a seismic profile is mainly used to conclude and clarify seismic response characteristics of the reef-beach of the Ordos basin in the Ordovician period, further a three-abnormity identification method is obtained, and the method achieves a good effect in application of actual data and well position deployment.
Description
technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a seismic interpretation method for identifying biological reefs and shoals. Background technique [0002] Exploration practices have shown that reef-shoal reservoirs have high abundance and high productivity, and their reserves account for more than 10% of the world's total proven oil and gas reserves, which have always been the key research targets in the field of oil and gas exploration. At present, the reef-shoal exploration in my country is mainly concentrated in the southern region, and the prediction of the reef-shoal reservoir deposited in the Ordovician Cremorian platform margin zone of the Lower Paleozoic in the Ordos Basin is in the initial stage of understanding, and there is no mature reference technical means. [0003] During the Ordovician Cremoli Period, the Ordos Basin underwent a large-scale transgression. After experiencing sea level rise, not on...
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IPC IPC(8): G01V1/30
CPCG01V1/30G01V1/305G01V1/307G01V2210/6222G01V2210/63G01V2210/632
Inventor 郭庆陈思歉余小雷聂建伟夏常亮阴钰毅
Owner BGP OF CHINA NAT GASOLINEEUM CORP