徐珂(1991-),男,四川遂宁人,博士,高级工程师,主要从事油气田生产和地质力学研究.E⁃mail:xuke-tlm@petrochina.com.cn. |
收稿日期: 2024-05-08
修回日期: 2024-08-17
网络出版日期: 2024-08-28
Method and application for ultra-deep carbonate reservoir quality evaluation: A case study of the Well X area in the Fuman Oilfield,Tarim Basin
Received date: 2024-05-08
Revised date: 2024-08-17
Online published: 2024-08-28
Supported by
The Major Science and Technology Project of CNPC(2023ZZ14-03)
the CNPC Youth Science and Technology Project(2024DQ03017)
塔里木盆地奥陶系超深碳酸盐岩储层油气资源丰富,但受多期构造活动及走滑断裂带扰动的影响,其分布呈现强非均质性。在断控缝洞体背景下,依据物性参数的储层品质评价方法存在不确定性,基于储层地质力学参数的方法显现优势。以富满油田X井区为例,在量化表征现今地应力、天然裂缝和岩石弹性模量等地质力学参数的基础上,借助碳酸盐岩缝洞体地质建模,定义储层品质评价因子,并建立其与天然裂缝密度、弹性模量、水平最小主应力和水平主应力差之间的量化关系,实现储层品质定量评价。结果表明:储层地质力学参数对断控缝洞型碳酸盐岩油气藏分布具有显著响应,是评价储层品质的有效方法手段之一。储层品质评价因子的高值区主要集中于走滑断裂带及其附近,X3井附近高值区范围大。研究成果为该类型油气藏的高效勘探和效益开发提供地质参考和支撑。
徐珂 , 张辉 , 尹国庆 , 蔡明金 , 刘磊 , 钱子维 . 超深断控缝洞型碳酸盐岩储层品质评价方法与应用——以塔里木盆地富满油田X井区为例[J]. 天然气地球科学, 2025 , 36(3) : 469 -478 . DOI: 10.11764/j.issn.1672-1926.2024.08.010
The Ordovician ultra-deep carbonate reservoirs in the Tarim Basin are rich in oil and gas resources; however, affected by multiple periods of tectonic activity and strike-slip faults, their distribution shows strong heterogeneity. In regions developing fault-controlled fractures and caves, there are uncertainties in reservoir quality evaluation methods based on physical property parameters, and methods based on geomechanical parameters show advantages. In this study, quantitative characterization of geomechanical parameters including present-day in-situ stress, natural fracture and rock elastic modulus were carried out, the carbonate fracture-cavity geological model was established, the relationship between natural fracture density, elastic modulus, horizontal minimum principal stress and horizontal stress difference was built, reservoir quality evaluation indicator was defined and calculated, and finally, reservoir quality was quantitatively evaluated. The results indicate that: (1) In the ultra-deep fault-controlled fracture-cavity carbonate reservoirs, the spatial distribution of geomechanical parameters has strong heterogeneity and is significantly affected by faults. It is segmented along the fault extension direction. The elastic modulus and natural fracture density indicate high values near the fault zone, resulting in that the present-day in-situ stresses are low values around fault zones. (2) Reservoir geomechanical parameters have a significant response to fault-controlled fracture-cavity carbonate oil and gas reservoirs. The method proposed here is effective to evaluate reservoir quality, high reservoir quality evaluation indicator is distributed around strike-slip faults and adjacent regions, e.g., Well X3 zones. The results can provide geological reference and support for efficient exploration and profitable development of fault-controlled fracture-cavity ultra-deep carbonate reservoirs.
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