杨剑萍;金权;吕传炳;张峰;李彦国;侯守探;李凤群;黄志佳;

• 1:中国石油大学(华东)地球科学与技术学院

• 2:中国石油大学(华东)海洋国家实验室海洋矿产资源评价与探测技术功能实验室

• 3:中国石油华北油田分公司机关开发部

• 4:中国石油华北油田分公司第三采油厂

摘要(Abstract)：

利用岩心观察、岩石薄片分析、物性资料及试油资料,结合盆地埋藏演化史,研究霸县凹陷西部陡坡带岔河集—高家堡地区沙河街组三段(沙三段)扇三角洲成岩作用特征及其对储层物性的影响。结果表明:西部陡坡带沙三段储层目前处于中成岩A期,在持续埋藏的背景下,经历碱性—酸性—碱性成岩环境的演变;成岩演化序列为压实作用/早期碳酸盐胶结—长石溶解/石英次生加大/自生高岭石胶结—灰泥杂基重结晶/晚期碳酸盐胶结/硬石膏胶结/石英弱溶解—黄铁矿胶结。不同沉积相带沉积特征不同,控制成岩演化特征的差异,决定物性演化的不同。扇三角洲平原辫状河道泥质砂岩埋藏早期压实作用较强,后期灰泥重结晶使物性急剧降低,现今主要发育干层。扇三角洲前缘水下分流河道远泥岩端储层,由于酸碱两期溶蚀作用使长石、石英和早期碳酸盐胶结物发生一定程度的溶蚀,油气充注进一步抑制晚期碳酸盐胶结作用,现今保留大量的残余原生孔隙和次生孔隙,可作为良好的油气储集层。扇三角洲前缘席状砂和水下分流河道近泥岩端砂岩早期碳酸盐胶结极为发育,在一定程度上抑制压实作用,但整体上中等的压实作用和较强的胶结作用使物性降低较快,早期碳酸盐胶结堵塞孔隙和喉道,导致酸性流体难以产生大范围的溶蚀,晚期碳酸盐、硬石膏胶结使孔隙度进一步降低,现今物性中等。

关键词(KeyWords)：扇三角洲;成岩演化;物性演化;沙河街组三段;陡坡带;霸县凹陷

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(41302078);; 国家科技重大专项(2011ZX05006-002)

作者(Author):杨剑萍;金权;吕传炳;张峰;李彦国;侯守探;李凤群;黄志佳;

Email:

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