火成岩裂缝性储层应力敏感性实验研究

摘要

建立了一套裂缝性油藏应力敏感性和裂缝滞后效应评价实验程序，提出了评价应力敏感性和裂缝滞后效应的量化指标。利用该评价程序对火成岩裂缝性岩心进行了应力敏感性和裂缝滞后效应评价。实验结果表明，不同类型裂缝性岩心的应力敏感性和裂缝滞后效应变化规律不同。对于火成岩裂缝性油藏，应制定合理的施工方案，尽量采用近平衡压力钻井，在开发过程中应控制采油速度，避免裂缝滞后效应和应力敏感性损害。%A test program is established to evaluate the stresssensitivity and fracture lag-effect of fractured reser-voir, and the qualified indexes are proposed thereby.Core samples from fractured reservoir of igneous rockis used to conduct the tests, and tests show that f or different fractured cores, their stress sensitivities andfracture lag-effects show different changing tendency.Thus for fractured reservoir of igneous rock, reason-able and suitable operation plans for drilling and pro-duction should be made. Near-balanced drilling shouldbe achieved, and in production, control of productionspeed is necessary, so as to avoid the formation dam-age caused by fracture lag-effect and stress sensitivitydamag