An Exploration Method for the Unconformity Triangular Zone at the Margin of Paleohigh
A triangle-belt and angle-unintegrated technology, applied in the field of petroleum exploration, which can solve problems such as lack of analytical technology
Active Publication Date: 2021-10-01
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology
[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] Such as 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 profi...
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The invention belongs to the technical field of petroleum exploration, and provides an exploration method for an unconformity triangular zone at the edge of a paleo-uplift, comprising step 1, determining the unconformity interface on a seismic profile; step 2, leveling the unconformity interface; step 3, On the flattened seismic profile, identify the sub-level eroded unconformity interface, and identify the wedge-shaped stratum structure formed by the eroded unconformity interface's erosion of the underlying strata, and determine the eroded unconformity triangle zone. Eroding the unconformity triangular zone is a favorable zone for unconformity traps, and the unconformity triangular zone is of great significance in predicting the distribution of oil and gas traps. The implementation of the invention is beneficial to the restoration of multi-stage paleo-uplifts and the stratum structure patterns caused by them. It is of great significance to study basin tectonic changes and paleo-uplift changes.
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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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)