构造的不确定性、储集层的非均质性及钻井过程中的各种工程因素，都使水平井的钻井成功率受到影响，新开发区块更是如此。
Structural uncertainty, reservoir's anisotropic and various engineering factors in drilling can influence the success rate of drilling horizontal Wells, especially in new development zone.
随着松辽盆地南部大型构造圈闭勘探的不断深入，勘探的目标区已经逐渐转移至以岩性因素起主导作用的非构造油气藏。
With further exploration of major structural traps in southern Songliao basin, the prospecting target has gradually focused on the non-structural reservoirs dominated by litho-stratigraphic traps.
濮城油田文51断块区是一个典型的多油层非均质油藏， 油气分布受构造—岩性双重因素控制。
The fault-block W51 is a typical multizones hetergenous reservoir, the oil-gas distribution is controlled by structure and lithology .
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