Title:
METHOD FOR DETERMINING CONDUCTIVITY DISTRIBUTION OF ACID-FRACTURED FRACTURE OF CARBONATE ROCK OIL AND GAS RESERVOIR BY EXPERIMENTATION
Document Type and Number:
WIPO Patent Application WO/2018/121046
Kind Code:
A1
Abstract:
A method for determining the conductivity distribution of acid-fractured fractures of a carbonate rock oil and gas reservoir by experimentation, comprising: simulating, by means of the acid-fracturing simulator, FracproPT, the extension of acid-fractured fractures and an acid-etching process under a well during an acid-fracturing process, and obtaining, along the direction of the length of hydraulic fractures, the data of fracture width distribution, fracture height distribution, temperature distribution, and acid liquid mass concentration distribution; selecting, in the direction of the length of hydraulic fractures, ten feature points of which the acid liquid mass concentrations are respectively 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10% of the initial mass concentration, and obtaining data of fracture width, fracture height, and temperature of the ten feature points; converting an injected acid discharging rate of an oil field site scale into an injected acid discharging rate of a laboratory scale; preparing an acid liquid for experiment, on the basis of the data of the acid liquid mass concentrations of the ten features points; simulating the acid-etching process, testing, by experimentation, the conductivity of the reservoir layer under closure stress, and drawing a distribution diagram of the conductivity of acid-etched fractures along the direction of fracture length under the reservoir layer condition. The method has a reliable principle and is easy to operate, having broad market prospects.
Inventors:
GOU BO (CN)
GUO JIANCHUN (CN)
CHEN CHI (CN)
REN JICHUAN (CN)
LAN JIE (CN)
LI XIAO (CN)
YANG BO (CN)
GUO JIANCHUN (CN)
CHEN CHI (CN)
REN JICHUAN (CN)
LAN JIE (CN)
LI XIAO (CN)
YANG BO (CN)
Application Number:
PCT/CN2017/109019
Publication Date:
July 05, 2018
Filing Date:
November 02, 2017
Export Citation:
Assignee:
UNIV SOUTHWEST PETROLEUM (CN)
International Classes:
E21B43/27; E21B49/00
Foreign References:
| CN106522935A | 2017-03-22 | |||
| CN103577886A | 2014-02-12 | |||
| CN103806890A | 2014-05-21 | |||
| CN101864949A | 2010-10-20 | |||
| CN105178939A | 2015-12-23 | |||
| CN104747182A | 2015-07-01 | |||
| US20150083420A1 | 2015-03-26 |
Attorney, Agent or Firm:
CHENGDU JINYING PATENT FIRM (CN)
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