[1]祝铭辰.多级压裂裂缝诱导应力优化计算模型研究[J].复杂油气藏,2019,12(03):77-80.[doi:10.16181/j.cnki.fzyqc.2019.03.016]
　ZHU Mingchen.An optimization model for induced stress of fracturesin multistage fracturing[J].Complex Hydrocarbon Reservoirs,2019,12(03):77-80.[doi:10.16181/j.cnki.fzyqc.2019.03.016]
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多级压裂裂缝诱导应力优化计算模型研究()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
12卷
期数:
2019年03期
页码:
77-80
栏目:
油气工程
出版日期:
2019-09-25

文章信息/Info

Title:
An optimization model for induced stress of fracturesin multistage fracturing
作者:
祝铭辰
中国石化华东油气分公司泰州采油厂地质研究所,江苏 泰州 225300
Author(s):
ZHU Mingchen
Institute of Geology, Taizhou Oil Production Plant, East China Branch of SINOPEC, Taizhou 225300, China
关键词:
多级压裂 诱导应力 计算模型 修正 净压
Keywords:
multistage fracturing;  induced stress;  calculation model;  modified;  net pressure
分类号:
TE357
DOI:
10.16181/j.cnki.fzyqc.2019.03.016
文献标志码:
A
摘要:
非常规储层多级压裂过程中,诱导应力是影响压裂效果的重要因素。现有的多级压裂的诱导应力计算模型,将各条裂缝看成独立的个体,并没有考虑裂缝间的相互影响的问题。由于裂缝净压力产生的诱导应力会改变地应力,而改变的地应力反过来又会影响裂缝净压力,据此,建立了多级压裂裂缝诱导应力的修正模型。通过COMSOL有限元软件模拟计算,表明修正后的模型具有较高的准确性。以致密砂岩水平井P1井为例,将计算数据与微地震监测数据进行对比,其差值结果均小于10 m,吻合度较高,为多级压裂设计以及压裂裂缝形态评价提供了科学依据。
Abstract:
In the process of multistage fracturing of unconventional reservoirs, induced stress is an important factor affecting the effect of fracturing. In the existing calculation models for induced stress of multistage fracturing, each fracture is independent, and the mutual influence between each factures has been ignored. The induced stress generated by net pressure of fracture will change the crustal stress, which will affect the net pressure conversely. Therefore, it was established the modified model for induced stress of fractures in multistage fracturing. The results coming from COMSOL show that the modified model has higher accuracy. It is also shown that the modified model has higher accuracy by contrasting the result of calculation with the result of microseismic-event cloud. Taking horizontal well P1 in tight sandstone as an example, the coincidence is high with the D-value less than 10 m. This can provide scientific basis for multistage fracturing design and the evaluation of fracture shape.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-02-22; 改回日期:2019-06-03。
作者简介:祝铭辰(1993—),助理工程师,从事采油工程与地质的研究,E-mail:zmc1993.love@163.com。
更新日期/Last Update: 2024-01-18