塔里木盆地A地区奥陶系断控体内幕精细表征
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杨昕睿(1998—),男,四川广安人,在读硕士研究生,从事储层建模及油藏描述方面研究。E-mail:1021554764@qq.com。

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Fine characterization of Ordovician inner fault-controlled bodies in area A of Tarim Basin
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    摘要:

    断控体储集空间类型多样、结构复杂,储层非均质性强,影响油气藏的勘探开发,准确刻画断控储集体内幕已成为断控体油气藏勘探开发的主要难点。综合地震、测井、录井等多种资料,建立断控体类洞穴的栅状结构模式,并通过地震多属性描述类洞穴的轮廓,自编程序将图像分析与数理统计充分结合,利用角砾带、簇间裂缝带的位置与宽度等参数界定类洞穴的核部与翼部区域,明确类洞穴不同部位的角砾带与簇间裂缝带的发育规模,实现类洞穴内幕角砾带、簇间裂缝带的精细刻画。研究结果表明,类洞穴内簇充填栅状结构由角砾带、簇间裂缝带和栅间基岩组成,且储集性能表现为:角砾带>簇间裂缝带>栅间基岩,角砾带与簇间裂缝带控制类洞穴的储集性。多簇的栅状结构决定储层分隔性及强非均质性;与平移段相比,挤压段栅状体走向发生逆时针偏移10°,拉分段栅状体走向发生逆时针偏移16°。综合走滑断裂类洞穴轮廓与类洞穴内幕等刻画,建立研究区断控体的空间分布模式,为下步断控体油气藏高效勘探开发提供地质依据。

    Abstract:

    It is a major difficulty to accurately characterize the inner fault-controlled bodies in the exploration and development of fault-controlled oil and gas reservoirs because the fault-controlled bodies are diverse in reservoir space, complicated in structure,and highly heterogeneous in reservoir space, which affects the exploration and development of the oil and gas reservoirs. The seismic,logging, and other data are integrated and the inner breccia zones and intercluster fracture zones of caverns-like were finely characterized in this paper. The grid structure models of the fault-controlled bodies caverns-like were established and their contours were described with seismic multiple attributes; the image analysis was fully combined with mathematical statistics by a selfcompiled program and the core and wing regions of the caverns-like were defined by the parameters such as the location and width of the breccia and intercluster fracture zones; the development scales of the breccia zones and intercluster fracture zones in different parts of caverns-like were determined. The results show that the cluster-filled grid structures of caverns-like are composed of the breccia zones, intercluster fracture zones, and intergrid matrix, and the reservoir properties of breccia zones is better than those of intercluster fracture zones, and they are better than those of the intergrid matrix. The breccia zones and intercluster fracture zones control the reservoir properties of caverns-like, and the multi-cluster grid structures determine the separateness and strong heterogeneity of the reservoirs. Compared with the translation sections, the grid strike bodies in the extrusion sections are counterclockwise offset by 10°, and those in the pull sections are counterclockwise offset by 16°. The spatial distribution models of fault-controlled bodies in this area are established by combining the strike-slip fault caverns-like contours and the inner caverns-like description,which provides a geological basis for efficient exploration and development of other fault-controlled oil and gas reservoirs.

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杨昕睿,尹艳树,王立鑫,尚浩杰.塔里木盆地A地区奥陶系断控体内幕精细表征[J].油气地质与采收率,2023,30(6):45~53

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  • 收稿日期:2023-04-10
  • 最后修改日期:2023-10-10
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  • 在线发布日期: 2023-12-21