现河庄构造地层水变化与油气聚集的关系

在地层水矿化度变化大的地区,地层电性特征易受到地层水的影响,矿化度的差异导致视地层电阻率的变化极为复杂,储集层含油气性不明显,这就给油水层的识别带来较大困难,容易漏失低阻油层。对现河庄构造沙三段地层水变化规律及其成因进行了研究,在单井精细解释的基础上,分析油水层在横向上变化规律。分析结果表明,现河庄构造沙三段的地层水高矿化度区通常是油气聚集的有利场所,其地层水的变化特征能够反映油气的聚集与保存条件。

Relationship between Formation Water Change and Oil and Gas Accumulation in Xianhezhuang Structure

In regions where formation water sanility change is great,formation electrical characteristics are easily affected by formation water and different salinities of formation water will result in very complicated variation of apparent formation resistivity and ambiguous evidence of petroliferous reservoir,which will lead to great difficulties for oil and water layer identification and it is easy to loss oil layers with low resistivity.Researched are formation water change rule and its causes of Es3 section in Xianhezhuang structure,analyzed is the horizontal change tendency in oil and water layer on the basis of single well interpretation and results show that regions with higher formation water sanility in Es3 section of Xianhezhuang structure are favorable places generally for oil and gas accumulation.Therefore,variation characteristics of formation water are able to reflect oil and gas accumulation and conservation.