<progress id="hp31b"><nobr id="hp31b"></nobr></progress>

<sub id="hp31b"><th id="hp31b"><delect id="hp31b"></delect></th></sub>
    <menuitem id="hp31b"></menuitem>
    <sub id="hp31b"></sub>

      <nobr id="hp31b"><dfn id="hp31b"><listing id="hp31b"></listing></dfn></nobr>

      產品展廳>>項目研發>>馬必東區塊煤層氣壓力恢復試井技術服務

      煤層氣井的快排和慢排對煤層氣井動態滲透率存在直接的影響,隨著排采的進行和壓力的改變,裂縫的受力狀態和張開度的變化使滲透率區域降低而影響產能??炫藕吐抨犆簩託鉂B透率的影響機理有多種理論依據,但大部分并沒有用實測數據進行驗證并應用到實際工程中。為分析煤層氣井的慢排方式,該氣井滲流能力的影響程度,需要進行關井壓恢測試、定壓排采測試及地層壓力恢復測試,研究分析壓后排采方式對氣井滲流能力的影響規律及利用壓力恢復試井解釋的壓力結果評價應力狀態,實現對煤層氣井的綜合評價。

      單相水階段測試要求:

      采用井下關井方式,地面直讀測試工藝,一開一關一開排液,開井排液階段進行定流壓降幅(一開慢排、二開快排)排液作業,保證氣體不解吸的情況下,關井壓恢測試;壓力降至解吸壓力附近進行定壓排采30天,測試定壓排采過程中水相滲透率變化情況,保證氣體不解吸的情況下,再次測試地層壓力恢復情況。

      針對開井流壓和關井壓力恢復數據點的采集,為了保持與管式泵同步,均采用相同的采樣時間間隔:下井、開井排液和關井壓力恢復階段,均采用每5分鐘采1個數據點。

      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層的產水能力

      在測試分析基礎上,結合排采實際,研究不同排采方式(憋壓和不憋壓)對儲層氣水兩相流滲流能力的影響規律。同時利用壓力恢復試井測試的壓力結果評價應力狀態。

      油氣井生產中會產生各類數據,如壓力恢復測試及生產動態數據等,不同數據有著不同的分析評價方法,我公司長期進行石油行業技術研究及服務,具有系統化的分析軟件,包括辰工壓裂停泵數據解釋分析軟件、辰工試井分析軟件、辰工生產數據分析軟件、辰工油氣井節點分析軟件等各類軟件,能夠充分利用油氣田生產的各類數據,實現對地層及壓后效果的正確評價,從而獲得可靠的儲量及產能,為實現油氣田高效經濟開發提供關鍵數據及優化方案,具有同類公司沒有的巨大優勢。

      Products>>Project Development>>Technical services for coalbed methane pressure recovery well testing

      The fast and slow discharge of CBM wells have a direct effect on the CBM wells dynamic permeability, and with the process of drainage and the change of pressure, the change of stress state and opening degree of cracks reduce the permeability area and affect the production capacity. The influence mechanism of coalbed gas permeability of fast and slow discharge has many theoretical bases, but most of them are not verified by the measured data and applied to the actual engineering. In order to analyze the slow discharge method and influence degree of the seepage capacity of the CBM well, it is necessary to carry out the shut in pressure recovery test, the constant pressure discharge test and the formation pressure recovery test.

      Though research analyzes, the influence of after pressure drainage method on the seepage capacity of gas wells and the pressure result by using pressure recovery well test explanation, to realize the comprehensive assessment of CBM wells.

      Single phase water state testing requirements:

      Adopting the downhole shut-in method, the surface direct reading test technology, open-close-open drainage, constant flow and pressure drop drainage is carry on during open well drainage stage (slow drainage for the first open well, quick drainage for the second open well), under the condition that the gas is not desorbed, the shut in pressure recovery test is carried out, and the pressure is reduced near the desorption pressure and the constant pressure drainage process will last for 30 days to test the change of water permeability in the process of constant pressure drainage, and to test the formation pressure recovery condition again when we guarantee the gas is not desorbed.

      For the collection of data points for open well flowrate pressure and shut-in pressure recovery, in order to maintain synchronization with the tubular pumps, the same sampling time intervals are used: one data point is taken every 5 minutes for the down, open well drainage and shut-in pressure recovery stages.

      Test results

      To verify the influence of the after-pressure discharge mode on the seepage capacity of gas wells.

      The gas saturation of fracturing fractures with different gas discharge pressure after casing pressure is compared.

      To verify the change of the seepage capacity of gas well and water in the process of stable casing pressure.

      Compare the formation pressure recovery condition before and after casing pressure in the same well.

      To verify the water producing capacity of the drainage process layer prior to stratified combined production and desorption.

      Based on the test and analysis, combine the drainage reality, the influence of different drainage methods on the seepage capacity of gas-water reservoir two-phase flow is studied. At the same time, the stress state is evaluated by using the pressure recovery well test results.

      All kinds of data will be produced in oil and gas well production, such as pressure recovery test and production dynamic data, different data have different analysis and evaluation methods, our company has carried on the oil industry technical research and service for a long time, has the systematic analysis software, including Chengong stop pump fracture data interpretation and analysis software, Chengong well testing analysis software, Chengong production data analysis software, Chen gong oil and gas well node analysis software and so on, we can make full use of all kinds of data of oil and gas field production, realize the correct evaluation of formation and after-pressure effect, thus obtain the reliable reserves and production capacity, provide the key data and optimization scheme for the high efficiency development of oil and gas field, we have great advantage than other kind of companies.

      高潮毛片无遮挡高清免费视频