現場測試10個多月，得到了測試數據，采用自主研發的煤層氣分析及數值模擬軟件進行分析計算。
| 數據 | 類型 | 辰工分析軟件 | 備注 |
|---|---|---|---|
| 壓裂施工數據 | 壓裂后壓力恢復數據 | 壓裂停泵數據分析軟件 | 評價壓裂效果，計算SRV區域，獲得分層產量比 |
| 壓力恢復數據 | 關井壓力測試數據 | 試井分析系統 | 獲得滲透率、裂縫半長 |
| 產水期生產數據 | 產水期壓力、水流量 | 生產數據分析軟件 | 獲得單井控制流動區域 |
| 產氣期生產數據 | 壓力、水產量、氣產量 | 生產數據分析軟件 | 獲得單井控制氣體儲量 |
| 綜合分析 | 生產數據 | 煤層氣數值模擬軟件 | 獲得氣相飽和度及壓力漏斗 |
本項目對煤層氣排采進行大量的研究，開展煤層動態資料的分析解釋，取得以下測試效果：
驗證壓后排采方式對氣井滲流能力的影響程度。
對比見套壓后，不同放氣壓力壓裂裂隙含氣飽和度情況。
驗證穩定套壓放氣達產過程對氣井水的滲流能力變化情況。
對比同一口井見套壓前后地層壓力恢復情況。
驗證分層合采解吸前排水過程分層產水能力。
提出煤層排采制度優化的壓-排-采全過程分析新理念。
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.
