西安地区由于过量开采地下水，引起地层压密效应，造成地面急剧下沉与重力值急剧增加。
In Xi 'an area, because the groundwater has excessively been exploited, the press-dense effect of strata appears so that the ground subsides and the gravity value increases sharply.
钻井后因应力集中产生的压密效应，使地层渗透率降低，影响油井产量。
Formation permeability is decreased and well production is affected due to compaction effect caused by stress concentration after drilling.
在热采项目中用压力降试井来估算蒸汽波及体积是非常重要的，而地层中热损效应在压力降试井分析中又是不可忽略的。
During thermal recovery, to estimate swept volume with pressure fall off test is very important, while hest loss effect of the formation can not be ignored during analysis of pressure fall off test.
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