Study on Production Performance of Shale Gas Reservoir using Production Data Analysis

Abstract

-This paper presents production data analysis for two production wells located in the shale gas field, Canada, with the proper analysis method according to each production performance characteristics. In the case A production well, the analysis was performed by applying both time and superposition time because the production history has high variation. Firstly, the flow regimes were classified with a log-log plot, and as a result, only the transient flow was appeared. Then the area of simulated reservoir volume (SRV) analyzed based on flowing material balance plot was calculated to 180 acres of time, and 240 acres of superposition time. And the original gas in place (OGIP) also was estimated to 15, 20 Bscf, respectively. However, as the area of SRV was not analyzed with the boundary dominated flow data, it was regarded as the minimum one. Therefore, the production forecasting was conducted according to variation of b exponent and the area of SRV. As a result, estimated ultimate recovery (EUR) increased 1.2 and 1.4 times respectively depending on b exponent, which was 0.5 and 1. In addition, as the area of SRV increased from 240 to 360 acres, EUR increased 1.3 times.

Technical Consideration for Production Data Analysis with Transient Flow Data on Shale Gas Well

“…이때 BDF 구간 에서 감퇴지수 b는 0.5를 일반적으로 적용하는데 이는 균열의 길이와 간격이 균일한 이상적인 다단계 수압 파쇄 수평정에서 나타나는 수치이다. Barnett shale gas reservoir-3.5years [5]. 생산기간이 상대적으로 짧은 PAD B, C 생산정의 SRT 그래프 분석을 위한 생산기간의 적절성을 확인 하기 위하여 PAD A 생산정의 생산자료를 분석하였 다 (Fig.…”