收稿日期: 2022-10-14
修回日期: 2022-12-16
网络出版日期: 2023-05-06
基金资助
中国石油集团十四五重大项目“海相碳酸盐岩成藏理论与勘探技术研究”(2021DJ05);国家自然科学基金重点基金项目“塔里木盆地重要富碳沉积期多类型富碳沉积与多因素耦合的巨量有机碳汇机制”(42230816)
Petroleum geology and distribution law of high efficiency areas in ultra-deep kiloton wells in Tarim Basin
Received date: 2022-10-14
Revised date: 2022-12-16
Online published: 2023-05-06
Supported by
The CNPC's 14th Five-Year Plan Major Project(2021DJ05);the National Key Fund Project(42230816)
断控缝洞型碳酸盐岩油气资源潜力巨大,但其控储控藏控富机理十分复杂,超深领域勘探开发难度更大、成本更高,培育高产井、高效井是推动超深领域资源优势转化为效益优势的重要途径。基于地球物理、油气地质、油层物理、地球化学等多学科动静态结合研究,阐明了多源流体、多期溶蚀、叠加复合的断控岩溶缝洞体形成机理与走滑断裂、不整合面为输导格架的多期成藏机理,构建了塔里木盆地富满油田超深断控缝洞型碳酸盐岩油气成藏地质模型,揭示了以Ⅰ级断裂破碎带为主线、大型缝洞体为主体、正地貌为背景的高效井分布规律;同时,创新形成了定断裂带、定富集段、定目标井、定井型与选位置、选靶点、选靶层、选靶向的“四定+四选”井位部署配套技术。据此部署的具有“主干断裂+正地貌+长串珠”特征的一批井点均获高产或成为千吨井,大幅提高了单井产量与最终可采储量(EUR),指导了勘探开发领域向纵深挺进,发现落实富满油田10×108 t油气储量并建成300×104 t级大油气田。
韩剑发, 王彭, 朱光有, 张银涛, 李世银, 谢舟 . 塔里木盆地超深层千吨井油气地质与高效区分布规律[J]. 天然气地球科学, 2023 , 34(5) : 735 -748 . DOI: 10.11764/j.issn.1672-1926.2022.12.015
Fault-controlled fractured-cave carbonate rocks have great potential for oil and gas resources, but their mechanism of controlling storage, reservoir and enrichment is very complex. Exploration and development in ultra-deep field is more difficult and cost-effective. Cultivating high-yield wells and high-efficiency wells is an important way to promote the conversion of resource advantages into benefit advantages in ultra-deep field. Based on the dynamic and static combination of geophysics, oil and gas geology, reservoir physics and geochemistry, the formation mechanism of multi-source fluid, multi-stage dissolution and superposition complex fault-controlled karst fracture cave body and multi-stage reservoir formation mechanism with strike-slip fracture and unconformity surface as transport guide frame are clarified, a geological model of hydrocarbon accumulation in ultra-deep fault-controlled fracture-cave carbonate rocks in Fuman Oil Field is established, and the distribution law of efficient wells is revealed, with the class I fracture zone as the main line, large fracture-cave body as the main body and normal landform as the background. At the same time, a set of well locations with characteristics of “main fracture + positive geomorphy + long string of beads” have been developed, which greatly improves the output of single well and EUR and guides the further development of exploration and development field. We found and implemented one billion tons oil and gas reserve in Fuman Oil Field and constructed four million tons large oil and gas field.
Key words: Ultradeep layer; Kiloton wells; Fault fracture; Oil-rich zone; Ordovician; Tarim Basin
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