Exploration method for paleo-uplift edge unconformity triangular belt
A technology of triangular belts and unconsolidated angles, which is applied in the field of oil exploration and can solve problems such as lack of analysis technology
Active Publication Date: 2020-12-11
CHINA UNIV OF GEOSCIENCES (BEIJING)
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[0002] In large basins with tectonic activity, a series of unconformities are formed due to multi-stage tectonic changes, and they are superimposed and compounded to form a complex stratigraphic structure. There is still a lack of analytical techniques for the stratigraphic structure characteristics of such basins
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[0029] best practice
[0030] In order to make those skilled in the art understand more clearly the high-precision flow calibration device provided by the present invention, it will be described in detail below with reference to the accompanying drawings.
[0031] like figure 1 As shown, the present invention provides a method for exploring the unconformity triangular zone at the edge of the paleo-uplift, which specifically includes the following steps:
[0032] S 1 , Determine the unconformity interface on the seismic section;
[0033] Preferably, step S 1 Can also include:
[0034] S 11 , Determine the unconformity interface by identifying the angular unconformity contact relationship on the seismic section, and perform drilling and seismic section calibration.
[0035] S 2 . Leveling the unconformity interface and its corresponding integration surface, wherein the integration surface corresponds to the unconformity interface;
[0036] S 3 1. On the seismic profile ...
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The invention belongs to the technical field of oil exploration, and provides an exploration method for a paleo-uplift edge unconformity triangular belt. The method comprises the following steps of: 1, determining an unconformity interface on a seismic section; step 2, flattening the unconformity interface; and step 3, identifying a next-stage truncated unconformity interface on the flattened seismic section, identifying a wedge-shaped stratum structure formed by the truncated unconformity interface for an underlying stratum, and determining a truncated unconformity triangular belt. Accordingto the method, the truncated unconformity triangular belt is an unconformity trap favorable belt; the unconformity triangular belt has important significance in the aspect of distribution prediction of oil and gas traps. The method is beneficial to the recovery of multi-stage paleo-uplift and stratum structure styles caused by the multi-stage paleo-uplift, and is of great significance for the research of basin structure transformation, paleo-uplift change and the like.
Description
technical field [0001] The invention relates to the field of oil exploration, in particular to an exploration method for an unconformity triangular zone at the edge of a paleo-uplift. Background technique [0002] In large basins with tectonic activities, a series of unconformities are formed due to multi-stage tectonic changes, and they are superimposed and compounded to form a complex stratigraphic structure. There is still a lack of analytical techniques for the stratigraphic structure characteristics of such basins. [0003] In the paleo-uplift zone, multi-stage denudation often leads to multiple unconformity complexes, forming unconformity superimposed belts, which represent areas of multi-stage structural uplift and denudation, and can reflect the distribution and changes of paleo-uplifts. Erosion unconformity triangular belts and overlapping unconformity triangular belts can also be identified on the marginal slope of the paleo-uplift. However, oil and gas exploratio...
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Login to View More IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 林畅松刘景彦李浩张曼莉
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)