黄骅坳陷张东地区油层精细评价与实践

Fine Evaluation and Practice of Oil Layers in Zhangdong area in Huanghua Depression

黄骅坳陷张东地区的油藏受岩性、构造双重控制,不同断块、同一断块的不同砂组压力系统不同,加之当时落后的钻井工程工艺技术,造成多口井油层污染严重,进一步增加了该区油层评价的难度。通过细分沉积相带、明确油藏特征,划小研究单元、细化模型建立进行油层评价,着重解决好矛盾井分析,对该区油层进行了精细评价,取得较好效果。该思路、方法对复杂地质条件下的精细油层评价具有一定借鉴。

Due to the double control of rock types and structures on oil reservoirs in Zhangdong area in Huanghua Depression, the pressure of sand formation distributed in different fault-block and that of different sand formation distributed in same a fault-block might be different. At that time, lagging drilling techniques resulted in heavy contaminated oil-layer of several wells and further increased the difficulty for oil-layer evaluation. By means of subdivision of sedimentary facies, determination of oil reservoirs, dividing the little research unit and the model to evaluate oil-layer, much attention has been paid to resolve the analysis of contradictory wells and conducted to fined evaluation for fine oil-layers, has achieved preferable effect. Its way of thinking and method can be valid for the fined reservoir evaluation with the complex geologic condition.