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Single-trap level favorable region optimal selection method under multi-geological factor quantitative constraints

A favorable area and geology technology, applied in the field of oil and gas exploration and deployment, can solve the problem that the geological characteristics of oil-bearing traps cannot be reflected in detail

Inactive Publication Date: 2015-10-21
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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Problems solved by technology

[0008] The advantage of the present invention is that trap elements, reservoir elements, source rock elements and source-reservoir relations are fully considered, and a method for optimizing favorable areas of a single trap under the quantitative constraints of various geological factors is drawn up to realize single-sandbody-level The study on the optimization of favorable areas for oil-bearing traps in small layers overcomes the shortcomings of previous overlapping of several reservoir factors and cannot reflect the geological characteristics of oil-bearing traps in detail, and enriches and improves the evaluation of favorable oil and gas target selection in oilfield exploration and development method, recognized by oilfield staff

Method used

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  • Single-trap level favorable region optimal selection method under multi-geological factor quantitative constraints
  • Single-trap level favorable region optimal selection method under multi-geological factor quantitative constraints
  • Single-trap level favorable region optimal selection method under multi-geological factor quantitative constraints

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Embodiment 1

[0030] Embodiment 1: as figure 1 , figure 2 , Figure 3a , Figure 3b , Figure 4a , Figure 4b , Figure 5a , Figure 5b , Figure 6a , Figure 6b , Figure 7a , Figure 7b , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 as shown,

[0031] The single-trap-level favorable area selection method under the quantitative constraints of various geological factors includes the following four aspects:

[0032] 1. Establish a single-sand body-level high-resolution 3D stratigraphic framework and compile a single-sand body-level top boundary structure map. Select standard wells in the whole area, establish a high-resolution stratigraphic framework in the study area in the direction of vertical provenance and parallel provenance, divide the stratigraphic framework to the level of single sand body, and extract the small sand bodies in the study area. The stratified data of the top boundary of the layer; combined with the extracted seismic layer data, faul...

Embodiment 2

[0048] Embodiment 2: as figure 1 , figure 2 , Figure 3a , Figure 3b , Figure 4a , Figure 4b , Figure 5a , Figure 5b , Figure 6a , Figure 6b , Figure 7a , Figure 7b , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the single-trap-level favorable area selection method under the quantitative constraints of various geological factors, taking the Fuyu oil layer in the northern Songliao Basin as an example, with geological data, seismic data, logging data and mud logging data as the supporting point, specifically The steps are:

[0049] (1) Data collection and arrangement: collect geological data, seismic data, well logging data and mud logging data in the Fuyu oil layer group in Songliao Basin; among them, geological data include geological stratification data, core and analysis test data; seismic data include 3D Seismic data volume and fault data; well logging data include natural gamma ray, acoustic time difference, microelectr...

Embodiment 3

[0079] Embodiment 3: as figure 1 , figure 2 , Figure 3a , Figure 3b , Figure 4a , Figure 4b , Figure 5a , Figure 5b , Figure 6a , Figure 6b , Figure 7a , Figure 7b , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the single-trap-level favorable area optimization method under the quantitative constraints of various geological factors includes the following steps:

[0080] 1) Data collection and arrangement: collect geological data, seismic data, well logging data and mud logging data in the study area; among them, geological data include geological stratification data, cores and analysis tests; seismic data include 3D seismic data volumes and fault data; Logging data include logging curves such as natural gamma ray, acoustic time difference, microelectrode, micropotential, deep lateral and shallow lateral; logging data include cuttings and logging data;

[0081] 2) Establishment of high-resolution single-sand body-level 3D st...

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Abstract

The invention relates to a single-trap level favorable region optimal selection method under multi-geological factor quantitative constraints. The method includes the following steps that: based on a high-resolution stratigraphic framework, a sedimentary unit-level isochronous sedimentary stratum can be formed through division in a longitudinal direction; five kinds of two-sandstone section oil and water splitting models can be established according to well logging data, mud logging data, well testing data, well logging interpretation oil and water data and seismic data; single-sand body-level oil and water splitting can be realized under the sedimentary unit-level isochronous stratigraphic framework; a single-sand body-level sub-layer roof surface structural graph, a sedimentary microfacies planar graph and an oil and water distribution law can be compiled; oil-containing traps can be determined according to river boundaries, faultage, micro-amplitude structures, and sandstone updip wedge out lines; trap area superimposition and trap thickness accumulation are performed on the oil-containing traps in different single-sand body-level sub-layers; favorable region evaluation indexes of trap type, reservoir porosity, reservoir depth, organic matter type, maturity, hydrocarbon-generating intensity and source-reservoir-cap combination are combined together so as to build an oil reservoir forming element probability and oil reservoir forming matching probability double-factor favorable evaluation model; and favorable regions can be selected optimally.

Description

technical field [0001] The invention relates to a method for optimizing favorable areas at a single trap level under the quantitative constraints of various geological factors, and belongs to the technical field of oil and gas exploration and deployment. Background technique [0002] Regarding the method of optimizing favorable areas for oil and gas exploration, there are countless related reports at home and abroad, emerging in endlessly, with different methods. To meet the needs of current exploration and development; therefore, according to the special accumulation conditions and geological characteristics of the study area, it is very necessary to propose a method for optimizing favorable areas. [0003] In the past, the optimization methods of favorable areas can be summed up mainly in two directions: qualitative analysis and quantitative analysis. Among them, the qualitative analysis includes three aspects: multivariate reservoir-controlling element overlay method, oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
Inventor 王文广曾冰艳王民卢双舫马世忠薛海涛肖佃师
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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