现场测试10个多月，得到了测试数据，采用自主研发的煤层气分析及数值模拟软件进行分析计算。
| 数据 | 类型 | 辰工分析软件 | 备注 |
|---|---|---|---|
| 压裂施工数据 | 压裂后压力恢复数据 | 压裂停泵数据分析软件 | 评价压裂效果，计算SRV区域，获得分层产量比 |
| 压力恢复数据 | 关井压力测试数据 | 试井分析系统 | 获得渗透率、裂缝半长 |
| 产水期生产数据 | 产水期压力、水流量 | 生产数据分析软件 | 获得单井控制流动区域 |
| 产气期生产数据 | 压力、水产量、气产量 | 生产数据分析软件 | 获得单井控制气体储量 |
| 综合分析 | 生产数据 | 煤层气数值模拟软件 | 获得气相饱和度及压力漏斗 |
本项目对煤层气排采进行大量的研究，开展煤层动态资料的分析解释，取得以下测试效果：
验证压后排采方式对气井渗流能力的影响程度。
对比见套压后，不同放气压力压裂裂隙含气饱和度情况。
验证稳定套压放气达产过程对气井水的渗流能力变化情况。
对比同一口井见套压前后地层压力恢复情况。
验证分层合采解吸前排水过程分层产水能力。
提出煤层排采制度优化的压-排-采全过程分析新理念。
Two experimental wells were selected on site, and the direct reading downhole permanent pressure gauge was put in. The data was directly transmitted to the headquarters database through PetroChina remote transmission system.
Each well is divided into six stages, four times in single-phase water phase and two times in gas production stage.
after more than 10 months of field test, the test data are obtained, and the self-developed coalbed methane analysis and numerical simulation software is used for analysis and calculation.
| data | type | software | function |
|---|---|---|---|
| The fracturing operation data | Post fracturing pressure recovery data | Fracturing stop-pump data analysis software | Evaluate the fracturing effect, calculate the SRV area, and obtain the production ratio of each layer |
| Pressure recovery data | Shut-in pressure test data | well test analysis system | Obtain permeability and fracture half-length |
| Water production data | Water production pressure and flowrate | Production data analysis software | Obtain single well control flow area |
| Gas production data | Pressure and water/gas production | Production data analysis software | Obtain single well control gas reserves |
| Comprehensive analysis | Production data | Coalbed methane numerical simulation software | Obtain gas phase saturation and pressure funnel |
This project has carried out a lot of research on CBM drainage and production, carried out the analysis and interpretation of CBM dynamic data, and achieved the following test results:
To verify the influence degree of post pressure drainage mode on
gas well seepage capacity.
The situation of gas saturation of different gas release pressure
fractures compares to casing pressure.
To verify the change of seepage capacity of gas well water in the
process of stable casing pressure gas release reaching production capacity.
Compare the formation pressure recovery of the same well before
and after casing pressure.
To verify the layered water production capacity of drainage
process before layered combined production and desorption.
Put forward a new concept of pressure-drainage-production whole
process analysis for optimization of CBM drainage system.
