Method for predicting recoverable reserves and evaluating development effect of gas drive reservoir

A technology for developing effects and evaluation methods, applied in data processing applications, complex mathematical operations, instruments, etc., and can solve problems such as application limitations, difficulty in generalization, and insufficient number of gas drive characteristic curves.

Pending Publication Date: 2019-12-06
CHINA NAT OFFSHORE OIL CORP +1
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with water drive curves, the number of gas drive characteristic curves is far from enough, and the existing gas drive characteristic curves still need to calculate DN p The size of +C, this parameter is related to oil and gas viscosity, volume coefficient, irreducible water saturation, crude oil geological reserves, etc. The combination of static and dynamic data is complex
On the other hand, the currently established chart for gas drive reservoirs is similar to Tong's standard water drive curve chart, which shows the relationship between the dimen

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for predicting recoverable reserves and evaluating development effect of gas drive reservoir
  • Method for predicting recoverable reserves and evaluating development effect of gas drive reservoir
  • Method for predicting recoverable reserves and evaluating development effect of gas drive reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040]The present invention provides a method for predicting recoverable reserves of a gas drive reservoir and evaluating the development effect, specifically as follows:

[0041] The first step is to establish the relational expression of the gas drive characteristic curve and the predictive relational expression of recoverable reserves:

[0042] Previous experiments on the relative permeability of oil and gas through miscible gas injection and immiscible gas injection showed that when the gas saturation is within a certain range in the middle-high gas-bearing stage, k rg / k ro -S g Satisfy the exponential function relationship (Formula 1).

[0043]

[0044] Among them, k rg ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for predicting recoverable reserves and evaluating a development effect of a gas drive reservoir. The method comprises: starting from an oil-gas two-phase seepage law,based on an exponential function relationship of gas-oil relative permeability, through a material balance equation and a Darcy law, deducing and establishing a novel gas-drive characteristic curve relation between the gas-oil ratio and accumulated oil under the condition of stable seepage of a gas-drive development oil field, reducing use of uncertain parameters, and providing a reliable oil reservoir engineering method for calculation of recoverable reserves in the middle and later periods of gas-drive oil field development; furthermore, drawing a gas-drive oil reservoir development effectevaluation chart through gas-drive characteristic curve derivation, the chart visually describing the internal relation among the gas-oil ratio, the recovery degree and the recovery ratio, and providing a basis for evaluation of the effects of oil field measures, comprehensive adjustment and the like.

Description

technical field [0001] The invention relates to the technical field of petroleum development reservoir engineering, in particular to a method for predicting recoverable reserves of gas drive reservoirs and evaluating development effects. Background technique [0002] The water drive characteristic curve is one of the important methods for predicting the recoverable reserves of water drive reservoirs and evaluating the development effect. After more than 70 years of research, there are currently more than 30 types of water drive characteristic curves, including A, B, C, and D The four most efficient characteristic curves are incorporated into industry standards. These four water flooding curves have unique application values ​​in oilfield work because of their different applicable fluid viscosity ranges. In gas drive reservoirs, Yang Guoxu (1995) proposed for the first time that the cumulative gas production G p and cumulative oil production N p It is a gas drive character...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/18G06Q10/06G06Q50/02
CPCG06F17/18G06Q10/0639G06Q50/02
Inventor 孟智强刘宗宾葛丽珍朱志强祝晓林张占女凌浩川王永平房娜宫平志
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap