新疆石油地质 ›› 2025, Vol. 46 ›› Issue (3): 296-307.doi: 10.7657/XJPG20250306
曹江骏a,b(), 张道锋a,b, 王继平a,b, 周游b,c, 李笑天a,b, 李娅a,b, 范倩倩a,b, 董倩云a,b
收稿日期:
2024-12-04
修回日期:
2024-12-17
出版日期:
2025-06-01
发布日期:
2025-06-13
作者简介:
曹江骏(1993-),男,陕西西安人,工程师,博士,沉积与储层地质学,(Tel)029-86978132(Email)基金资助:
CAO Jiangjuna,b(), ZHANG Daofenga,b, WANG Jipinga,b, ZHOU Youb,c, LI Xiaotiana,b, LI Yaa,b, FAN Qianqiana,b, DONG Qianyuna,b
Received:
2024-12-04
Revised:
2024-12-17
Online:
2025-06-01
Published:
2025-06-13
摘要:
庆阳气田二叠系山1段埋藏深度大,成岩作用复杂,成岩-孔隙演化差异大,对有利储集层认识不清晰。利用铸体薄片、扫描电镜、高压压汞、阴极发光、自生黏土矿物X射线衍射等资料,结合前人研究成果,对庆阳气田山1段成岩作用进行研究。结果表明:庆阳气田山1段从西南至东北依次发育曲流河三角洲平原亚相及前缘亚相,前缘亚相储集层较平原亚相储集层而言,填隙物含量低,孔隙发育,孔喉结构好,物性较高;沉积作用控制了储集层的初始孔隙度,差异性成岩-孔隙演化影响了储集层的致密化程度,前缘亚相储集层初始孔隙度较高,压实-胶结作用降低了36.34%的孔隙度,溶蚀作用升高了4.28%的孔隙度,现今平均孔隙度为7.13%,平原亚相储集层初始孔隙度较低,压实-胶结作用降低了37.72%的孔隙度,溶蚀作用升高了3.65%的孔隙度,现今平均孔隙度为4.43%;前缘亚相储集层经历了中等压实作用降低孔隙度—中等胶结作用降低孔隙度—中等溶蚀作用升高孔隙度的致密化过程,储集层质量较好;平原亚相储集层经历了强压实作用降低孔隙度—中等胶结作用降低孔隙度—弱溶蚀作用升高孔隙度的致密化过程,储集层质量较差。
中图分类号:
曹江骏, 张道锋, 王继平, 周游, 李笑天, 李娅, 范倩倩, 董倩云. 庆阳气田山1段差异性成岩作用及其对储集层的影响[J]. 新疆石油地质, 2025, 46(3): 296-307.
CAO Jiangjun, ZHANG Daofeng, WANG Jiping, ZHOU You, LI Xiaotian, LI Ya, FAN Qianqian, DONG Qianyun. Differential Diagenesis of Shan-1 Member and Its Impact on Reservoirs in Qingyang Gas Field[J]. Xinjiang Petroleum Geology, 2025, 46(3): 296-307.
图7
庆阳气田山1段储集层成岩作用 a—塑性岩屑颗粒被挤压变形,呈假杂基充填孔隙,H4井,平原亚相,4 241.2 m,单偏光;b—刚性石英颗粒被挤压破碎,L43井,前缘亚相,4 156.1 m,单偏光;c—丝发状伊利石胶结,L46井,平原亚相,4 269.5 m,扫描电镜;d—蜂窝状伊蒙混层胶结,L46井,前缘亚相,4 269.5 m,扫描电镜;e—绿泥石以薄膜状附着于孔隙表面,Q2井,前缘亚相,3 975.8 m,单偏光;f—针叶状绿泥石胶结,L2-45井,平原亚相,3 835.4 m,单偏光;g—六方板状高岭石胶结,L20井,前缘亚相,3 848.5 m,扫描电镜;h—高岭石晶间微孔,L47井,平原亚相,4 000.2 m,单偏光;i—早期方解石基底式胶结,L5井,前缘亚相,4 028.0 m,正交偏光;j—晚期铁方解石胶结,L3井,前缘亚相,4 079.8 m,单偏光;k—早期方解石发橙黄色光,L1井,平原亚相,4 258.0 m,阴极发光;l—晚期铁方解石发橘红色光,L27井,平原亚相,4 392.1 m,阴极发光;m—马鞍状铁白云石,L20井,前缘亚相,4 018.5 m,扫描电镜;n—块状菱铁矿胶结,Q5井,平原亚相,4 298.1 m,单偏光;o—Ⅲ级石英加大边,H1井,前缘亚相,3 699.6 m,单偏光;p—石英单晶胶结,L38井,前缘亚相,4 386.3 m,单偏光;q—粒间溶孔,L38井,前缘亚相,4 385.5 m,单偏光;r—长石溶孔,C3-4井,平原亚相,3 826.9 m,单偏光;s—岩屑溶孔,H30井,平原亚相,3 937.9 m,单偏光;t—杂基溶孔,L6-7井,平原亚相,4 602.2 m,单偏光。"
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