复杂断块油田油气不均一分布特征及主控因素

油气不均一分布是含油气盆地中油气分布的普遍规律，这在复杂断块油田尤为明显：同一复杂断块油田不同断块之间或不同层段之间的原油物性及油气富集程度差异较大；同一断块内由于储层非均质性及成岩作用不同，断块内部油气分布也存在不均一性；复杂断块油田油藏类型复杂多变，且多与断层相关。断–砂配置和断层性质的差异性是导致同一复杂断块油田的不同断块油气富集差异性的关键因素；断层规模、产状、力学性质以及断层的平面或剖面组合样式等，均对油气富集有着重要影响。运用“断块区控制油气富集区”的思想来指导油气勘探工作，可以起到良好的效果。

Hydrocarbon Heterogeneous Distribution and Main Controlling Factors of Complex Fault-block Oilfield

The hydrocarbon heterogeneous distribution is the universal law in oil and gas bearing basin，especially in complexfault-block oilfield. The crude oil properties and the enrichment of oil and gas accumulation of different fault-blocks or differentlayers vary greatly in the same complex fault-block zone. Due to the difference of heterogeneity and diagenesis of reservoirin the same fault-block，hydrocarbon is also distributed heterogeneously. The types of oil reservoirs in complex fault-blockoilfields are complex and changeable，and often related with fault. The diversity of configuration of fault and sand body and theproperties of the fault are the key factors leading to hydrocarbon heterogeneous distribution. The scale of fault，fault occurrence，mechanical properties and the combination style of the fault in the plane or in profile etc，also have an important influence onoil and gas enrichment. Therefore，the concept of“blocks control petroleum enriched areas”will favorably contribute to oiland gas exploration.