石油与天然气地质 ›› 2025, Vol. 46 ›› Issue (5): 1485-1503.doi: 10.11743/ogg20250507
• 油气地质 • 上一篇
李晓龙1,2(
), 白玉彬1,2(
), 陈珊珊3, 张刚4, 王聪娥5
收稿日期:2025-06-07
修回日期:2025-09-17
出版日期:2025-10-30
发布日期:2025-10-29
通讯作者:
白玉彬
E-mail:1326030435@qq.com;baiyubin@xsyu.edu.cn
第一作者简介:李晓龙(2000—),男,硕士研究生,致密油、致密储层。E‑mail: 1326030435@qq.com。
基金项目:
Xiaolong LI1,2(
), Yubin BAI1,2(
), Shanshan CHEN3, Gang ZHANG4, Cong’e WANG5
Received:2025-06-07
Revised:2025-09-17
Online:2025-10-30
Published:2025-10-29
Contact:
Yubin BAI
E-mail:1326030435@qq.com;baiyubin@xsyu.edu.cn
摘要:
鄂尔多斯盆地甘泉地区三叠系延长组长7油层组发育三角洲前缘和重力流型致密油藏。为了明确不同沉积构型单元储集性能的差异及其对油藏分布与富集的控制机制。综合利用岩心、测井和生产动态资料,分析了长7油层组三角洲和重力流沉积内部单砂体构型特征、纵向接触关系和分布规律。研究了砂体构型对油藏分布的控制作用,结合试油、试采资料,建立了砂体构型油气成藏模式。研究结果表明:①长7油层组纵向上主要发育连续叠加型、间隔叠加型、薄互层型和单层型4种砂体构型,横向上发育稳定型、摆动型和迁移型3种砂体构型。②纵向上长71油层亚组主要发育连续叠加型,间隔叠加型次之;长72油层亚组主要发育间隔叠加型,薄互层型次之;长73油层亚组主要发育薄互层型和单层型。平面上连续叠加型和间隔叠加型主要分布于研究区北部和东北部;薄互层型主要发育在研究区中部向南一侧区域;单层型集中分布于南部地区。③储集性能最优的构型为连续叠加型和间隔叠加型,其中连续叠加型砂体的油气产量最高。④不同构型砂体与烃源岩的叠置关系存在差异,研究区砂体构型和烃源岩有4类源-储配置关系。长71油层亚组的连续叠加型油气富集程度最高;长72油层亚组的的间隔叠加型次之;长73油层亚组主要为烃源岩。长71油层亚组的连续叠加型砂体是下一步勘探的优选目标。
中图分类号:
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