Lithofacies prediction method of glutenite body under the control of isochronous stratigraphic model
A stratigraphic model and prediction method technology, applied in the field of geological exploration, can solve the problems of difficult and inaccurate prediction of lithofacies, and achieve the effects of improving interpretation accuracy and interpretation efficiency, reducing human error, and reducing the influence of subjective factors.
Active Publication Date: 2022-02-22
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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[0006] In view of this, the present invention provides a lithofacies prediction method of glutenite body under the control of an isochronous stratum model, which solves the problem that the establishment of isochronous stratum model and lithofacies prediction in the prior art are difficult and not accurate enough
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, 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.
[0038] In this embodiment, the specific steps of the present invention are described by taking the Yanjia area located in the northeast of the Dongying depression in the Jiyang depression as an example:
[0039] The Yanjia area is located in the northeast of the Dongying Sag in the Jiyang Depression, controlled by the Chennan Fault, a large boundary fault, and a large number of nearshore subaqueous fan glutenite bodies have been deposited since the Early Tertia...
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The invention discloses a lithofacies prediction method of glutenite body under the control of an isochronous stratum model, comprising: calibrating the well-seismic relationship according to the well-seismic frequency spectrum analysis, fischer curve and coupling coefficient; decomposing and obtaining the intrinsic mode function according to the EMD component to realize the reconstruction of the seismic section; establish a preliminary three-dimensional virtual grid; form a node grid and constrain the basic object unit with the relevant threshold value; use the application value function to calculate the correlation index between object units, and the high correlation index Connect the object units to obtain the horizon framework, and then refine and interpolate the three-dimensional isochronous stratigraphic model according to the succession of stratum deposition; obtain the isochronous strata slice according to the isochronous stratum model, and analyze the lithofacies of the glutenite body through the isochronous stratum slice. . The invention greatly improves the sequence division accuracy of glutenite bodies, and predicts the lithofacies that affect the heterogeneity of glutenite bodies through the optimization of sensitive attributes under the constraints of the model, providing a reference for the exploration and development of deep glutenite bodies and basis.
Description
technical field [0001] The invention relates to the technical field of geological exploration, in particular to a lithofacies prediction method of glutenite body under the control of an isochronous stratum model. Background technique [0002] Glutenite body is a concept of lithology, and it is a common name for coarse clastic deposits in the steep slope zone of continental faulted basins by oilfields. After half a century of unremitting efforts by several generations of oil explorers, the glutenite body in the Yanjia area has gradually deepened its geological understanding (Kong Fanxian, 2000; Sun Longde, 2003; Cao Yingchang et al., 2014). An important position for increasing reserves and increasing production. However, with the increasingly hidden exploration targets (increasing burial depth, and the reservoir type shifting to lithologic reservoirs), coupled with the development of engineering technology—especially the development of horizontal wells and large-angle deviat...
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IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 周健林承焰李迪韩长城
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)