Trap evaluation method for heterogeneous thin sandstone interbed oil reservoir

An evaluation method and a heterogeneous technology, applied in the field of oil and gas exploration, which can solve problems such as the difficulty of recalculating reserves and deploying exploration wells effectively.

Active Publication Date: 2018-12-21
SOUTHWEST PETROLEUM UNIV +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a trap evaluation method for heterogeneous thin sandstone interbedded reservoirs, so as to solve the problem in the prior art that it is difficult to effectively carry out the late reserve recalculation and exploratory well deployment of heterogeneous interbedded old oilfields, and to realize The purpose of providing a post-evaluation method for heterogeneous traps in mature oilfields

Method used

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  • Trap evaluation method for heterogeneous thin sandstone interbed oil reservoir
  • Trap evaluation method for heterogeneous thin sandstone interbed oil reservoir
  • Trap evaluation method for heterogeneous thin sandstone interbed oil reservoir

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Embodiment 1

[0043] Such as figure 1 The trap evaluation method of the heterogeneous thin sandstone interbedded reservoir shown includes the following steps:

[0044] (a) Combining well logging data, drilling and logging data, coring data, and seismic inversion data, stratigraphic correlation and division and sedimentary environment research are carried out; at the same time, source rock evolution data is obtained through geochemical data;

[0045] (b) Combining stratigraphic correlation and division, sedimentary environment research, and source rock evolution data to obtain reservoir characteristics;

[0046] (c) According to the seismic data, sequentially carry out seismic and geological comprehensive calibration, fault interpretation and development stage analysis, structural horizon tracking, structural evolution analysis, and structural trap analysis;

[0047] (d) Carrying out oil and gas accumulation research based on the results of the structural evolution analysis combined with th...

Embodiment 2

[0050] Such as figure 1 The trap evaluation method for heterogeneous thin sandstone interbedded reservoirs shown is based on Example 1:

[0051] The seismic inversion data is obtained by the following steps: (1) taking the structurally stable mudstone in the target area as the marker layer, and taking the new well with the highest quality of the logging curve as the standard well to standardize the logging curve, and perform fine synthetic record calibration; 2) On the basis of fine synthetic record calibration, multi-well integrated wavelet extraction is carried out to obtain multi-well integrated wavelet map; (3) On the basis of multi-well integrated wavelet map, a low-frequency model is established; (4) through constraints Sparse pulse inversion method, log-constrained wave impedance inversion: if the coincidence degree between the inverted wave impedance and the original wave impedance is less than 60%, go back to step (1), re-select the standard well to standardize the lo...

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Abstract

The invention discloses a trap evaluation method for a heterogeneous thin sandstone interbed oil reservoir. The method comprises the steps of (a), carrying out stratum correlation and classification and sedimentation environment research through combination of well logging information, well drilling and logging information, coring information and seismic inversion data, and moreover, obtaining hydrocarbon source rock evolution data through utilization of geochemistry information; (b), obtaining reservoir characteristics through combination of the stratum correlation and classification, sedimentation environment research and the hydrocarbon source rock evolution data; (c), carrying out seismogeology comprehensive calibration, fracture explanation and growth period analysis, tectonic level tracking, tectonic evolution analysis and tectonic trap analysis in sequence according to seismic data; (d), carrying out hydrocarbon accumulation research through combination of the reservoir characteristics according to a tectonic evolution analysis result; and (e), carrying out final favorable trap evaluation. According to the method, the problem that in the prior art, later period reserve volume recalculation and exploratory well deployment work of a heterogeneous interbed old oil field are difficult to develop effectively is solved, and a purpose of providing a heterogeneous trap later period evaluation method for the old oil field is realized.

Description

technical field [0001] The invention relates to the field of oil and gas exploration, in particular to a trap evaluation method for heterogeneous thin sandstone interbedded reservoirs. Background technique [0002] Reservoir heterogeneity refers to the spatial inhomogeneity of the parameters that characterize the reservoir, which is a common characteristic of the reservoir. In the evaluation of reservoir development, the heterogeneity of the reservoir refers to the dual heterogeneity of the reservoir, that is, the heterogeneity of the rock that hosts the fluid and the nature and occurrence of the fluid in the rock space. heterogeneity. Reservoir heterogeneity includes both the heterogeneity of macroscopic development characteristics and the heterogeneity of microscopic pore structure. The content of reservoir heterogeneity research is varied, mainly including reservoir heterogeneity classification, evaluation, cause analysis, impact on reservoir properties and fluid proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 卢浩唐洪明刘志斌王贺华何巍蒋利平
Owner SOUTHWEST PETROLEUM UNIV
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