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          產品展廳>>項目研發>>致密儲層體積壓裂邊界影響及滲流特征研究

          目前油田勘探目標和攻關對象主要是致密儲層,對于此類儲層,往往需要在長水平井中通過多級水力壓裂進行儲層改造、井網加密和其他措施以提高油氣產量,實現高效經濟開發。然而,水平井多段壓裂改造是世界級難題,也是制約水平井在低滲儲層應用的技術瓶頸,其關鍵技術在于:研究水平井油藏工程以解決水平井布井難題;研究就地應力場以解決水力裂縫起裂及形態問題;研究水平段分段壓裂優化設計以解決多段裂縫設置問題;研究分段壓裂工藝和工具以解決水平井分段壓裂的實施問題;研究裂縫監測以解決多段裂縫評估問題。

          國內外對常規壓裂試井技術研究很多,試井方法較為完善,但是對致密多段壓裂水平井試井技術研究還處于發展階段,滲流特征認識還不夠深入,還未形成成熟解釋方法。因此研究開發致密儲層試井分析方法成為目前試井應用方面需要解決的重要問題。

          大規模體積壓裂數學模型建立及求解研究

          水平井體積壓裂改造區和原狀地層滲流規律對試井模型影響

          致密非達西滲流研究,分析啟動壓力梯度對流動的影響

          數據反演確定地層參數方法研究及影響因素分析

          注采滲流阻力研究數學模型及不同液量下壓力-距離的公式,并進行特征曲線分析

          利用不穩定試井資料進行產能分析預測計算模型及產能曲線

          該項目對致密多段壓裂水平井試井技術研究取得了突破,提出了致密試井分析方法,為頁巖油體積壓裂開發過程中的試井評價提供了技術保障。并且實現了模型建立-模型求解-生產應用的有效結合,解釋提供了地層滲透率、井儲常數、表皮系數、裂縫半長、啟動壓力等參數,現場應用效果良好。

          Products>>Project Development>>Study on the influence of volume fracturing boundary and seepage characteristics of dense reservoir

          At present, the exploration targets and key research objects of the oilfield are mainly dense reservoirs. For such reservoirs, it is often necessary to carry out reservoir reconstruction, well pattern infilling and other measures through multi-stage hydraulic fracturing in long horizontal wells to improve oil and gas production and realize efficient and economic development. However, multi-stage fracturing of horizontal wells is a world-class problem and a technical bottleneck restricting the application of horizontal wells in low-permeability reservoirs. The key technologies are: studying horizontal well reservoir engineering to solve the problem of horizontal well layout; Study the in-situ stress field to solve the problems of hydraulic fracture initiation and shape; Study the optimal design of staged fracturing in horizontal section to solve the problem of multi-stage fracture setting; Study the staged fracturing technology and tools to solve the implementation problem of staged fracturing in horizontal wells; Crack monitoring is studied to solve the problem of multi-stage crack evaluation.

          Establishment and solution of mathematical model for large-scale volume fracturing

          Influence of seepage law in volume fracturing zone and undisturbed formation of horizontal well on well test model

          Study on dense non-Darcy seepage: The influence of start-up pressure gradient on flow is analyzed

          Study on the method of determining formation parameters by data inversion and analysis of influencing factors

          The mathematical model of injection and production seepage resistance and the formula of pressure-distance under different liquid volume are studied, and the characteristic curve is analyzed

          Productivity analysis and prediction calculation model and productivity curve using unstable well test data

          The project has made a breakthrough in the research of tight multi-stage fracturing horizontal well test technology, and proposed a tight well test analysis method, which provides a technical guarantee for well test evaluation in the process of shale oil volume fracturing development. The effective combination of model establishment, model solution and production application is realized. The interpretation provides parameters such as formation permeability, well storage constant, skin coefficient, fracture half-length and start-up pressure. The field application effect is good.

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