使用嵌入式离散裂缝建模（EDFM）方法优化具有复杂裂缝系统的油藏的数值模拟,完善了前人的Eagle Ford页岩油综合描述技术。根据裂缝支撑类型对具有100 000多个裂缝面的复杂裂缝系统进行分类后,对井底流压进行了历史拟合,对油田产量进行了预测,以更深入地了解复杂裂缝支撑效果对产量的影响。在为不同支撑类型裂缝组分配不同的压实曲线后估算的压降表明,如果采用EDFM方法而不是非结构网格方法进行裂缝建模和筛选,裂缝模型表达更精确,有效波及面积可能会小于非结构网格方法。方法优化后,能够将EDFM与第三方裂缝扩展模拟器自动耦合,同时考虑支撑剂强度沿复杂裂缝系统的变化。该方法能够从裂缝评价和多个全井眼的拟三维裂缝扩展结果中准确地模拟复杂的裂缝延伸和井间干扰,从而更准确地评价完井效果。图11参20
FIALLOS Mauricio
,
MORALES Adriá
,
n
,
YU Wei
,
MIAO Jijun
. 基于嵌入式离散裂缝建模的Eagle Ford页岩油复杂水力裂缝综合表征[J]. 石油勘探与开发, 2021
, 48(3)
: 613
-619
.
DOI: 10.11698/PED.2021.03.16
This study extends an integrated field characterization in Eagle Ford by optimizing the numerical reservoir simulation of highly representative complex fractured systems through embedded discrete fracture modeling (EDFM). The bottom-hole flowing pressure was history-matched and the field production was forecasted after screening complex fracture scenarios with more than 100 000 fracture planes based on their propped-type. This work provided a greater understanding of the impact of complex-fractures proppant efficiency on the production. After compaction tables were included for each propped type fracture group, the estimated pressure depletion showed that the effective drainage area can be smaller than the complex fracture network if modeled and screened by the EDFM method rather than unstructured gridding technique. The essential novel value of this work is the capability to couple EDFM with third-party fracture propagation simulation automatically, considering proppant intensity variation along the complex fractured systems. Thus, this work is pioneer to model complex fracture propagation and well interference accurately from fracture diagnostics and pseudo 3D fracture propagation outcomes for multiple full wellbores to capture well completion effectiveness after myriads of sharper field simulation cases with EDFM.
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