Correction method for abnormal productivity test data of strong heterogeneous carbonate gas reservoir

By plotting gas production curves and dividing flow sections, and combining core exhaustion experiments and production pressure differential flow factor correction of the production capacity equation, the problem of correcting abnormal production capacity well test data in strongly heterogeneous carbonate gas reservoirs was solved, achieving accurate production capacity evaluation and reservoir development optimization.

CN117627635BActive Publication Date: 2026-06-05PETROCHINA CO LTD
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2022-08-16
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies cannot effectively correct abnormal production test data in highly heterogeneous carbonate gas reservoirs, leading to inaccurate early-stage and early-stage production capacity assessments of gas fields.

Method used

By plotting gas production curves and dividing flow sections, it is determined whether there are unstable gas production under small pressure differences and stable production under large pressure differences in the reservoir. Combined with core exhaustion experiments, the production capacity contribution rate of different reservoirs is obtained. The production pressure difference flow factor is introduced to correct the production capacity equation and establish a corrected fitting chart that conforms to geological characteristics.

Benefits of technology

It enables accurate correction of abnormal production capacity well test data, describes the seepage characteristics of the pore-fractured media system, provides reliable production capacity evaluation results, and supports the optimization of gas reservoir development well network and production organization.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117627635B_ABST
    Figure CN117627635B_ABST
Patent Text Reader

Abstract

The application discloses a kind of strong non-homogeneous carbonate gas reservoir abnormal productivity well test data correction method, comprising:1, draw gas production curve and divide flow section, judge whether the phenomenon of unstable small differential pressure gas production and stable large differential pressure production appears in reservoir;2, obtain the productivity contribution rate of different reservoirs of gas well in early, middle and late periods of depletion, judge whether the productivity contribution rate of gas well in different depletion periods is consistent;3, evaluate and explain productivity test data, obtain productivity equation and initial fitting chart based on productivity equation, find out abnormal productivity test data according to initial fitting chart, the results of steps 1 and 2;4, introduce production pressure differential flow factor under different production pressure differentials to correct productivity equation, obtain correction fitting chart based on corrected productivity equation, and correct abnormal productivity test data using correction fitting chart.The present application can find out abnormal productivity test data and effectively correct according to existing related data.
Need to check novelty before this filing date? Find Prior Art