Solidifying mud cake to improve cementing quality of shale gas well: A case study

被引：0
作者：
China University of Geosciences, Wuhan, China [1 ]
不详 [2 ]
不详 [3 ]
不详 [4 ]
机构：
[1] China University of Geosciences, Wuhan
[2] Wellbore Technology Department, Exploration Branch, SINOPEC, Chengdu
[3] Huanghe Drilling Co., Shengli Petroleum Engineering Co., Ltd., SINOPEC, Dongying
[4] Well Cementing Branch, Southwest Petroleum Engineering Co., Ltd., SINOPEC, Deyang
来源：
Open Fuels Energy Sci. J. | / 149-154期
基金：
中国国家自然科学基金;
关键词：
Cement-interlayer interface; Mechanism; Mud cake solidifier; Shale gas well;
D O I：
10.2174/1876973X01508010149
中图分类号：
学科分类号：
摘要：
The purpose of this study is to improve the cementing quality of shale gas well by mud cake solidification, as well as to provide the better annular isolation for its hydraulic fracturing development. Based on the self-established experimental method and API RP 10, the effects of mud cake solidifiers on the shear strength at cement-interlayer interface (SSCFI) were evaluated. After curing for 3, 7, 15 and 30 days, SSCFI was remarkably improved by 629.03%, 222.37%, 241.43% and 273.33%, respectively, compared with the original technology. Moreover, the compatibility among the mud cake solidifier, cement slurry, drilling fluid and prepad fluid meets the safety requirements for cementing operation. An application example in a shale gas well (Yuanye HF-1) was also presented. The high quality ratio of cementing quality is 93.49% of the whole well section, while the unqualified ratio of adjacent well (Yuanba 9) is 84.46%. Moreover, the cementing quality of six gas-bearing reservoirs is high. This paper also discussed the mechanism of mud cake solidification. The reactions among H3AlO42- and H3SiO4 - from alkali-dissolved reaction, Na+ and H3SiO4 - in the mud cake solidifiers, and Ca2+ and OH- from cement slurry form the natrolite and calcium silicate hydrate (C-S-H) with different silicate-calcium ratio. Based on these, SSCFI and cementing quality were improved. © Xiaomeng and Ping; Licensee Bentham Open.
引用
收藏
页码：149 / 154
页数：5
相关论文
共 33 条
  • [1] Christophe M., Jamie S., Steve S., Unconventional gas - A review of regional and global resource estimates, Energy, 55, pp. 571-584, (2013)
  • [2] Clarkson C.R., Jensen J.L., Chipperfield S., Unconventional gas reservoir evaluation: What do we have to consider, J. Nat. Gas Sci. Eng., 8, pp. 9-33, (2012)
  • [3] Economides M.J., Wood D.A., The state of natural gas, J. Nat. Gas Sci. Eng., 1, 1-2, pp. 1-13, (2009)
  • [4] Guarnone M., Rossi F., Negri E., Grassi C., Genazzi D., Zennaro R., An unconventional mindset for shale gas surface facilities, J. Nat. Gas Sci. Eng., 6, pp. 14-23, (2012)
  • [5] Chen M., Sun Y., Fu P., Charles R.C., Lu Z., Charles H.T., Thomas A.B., Surrogate-based optimization of hydraulic fracturing in pre-existing fracture networks, Com. Geosci., 58, pp. 69-79, (2013)
  • [6] Dmitry N., Michael J., Victor N., Fluid leakoff determines hydraulic fracture dimensions: Approximate solution for non- Newtonian fracturing fluid, Int. J. Eng. Sci., 49, pp. 809-822, (2011)
  • [7] Daniel J.M., Huang X., Li H., Sirirat K., Albert L., Dileep A., Thomas H., Donald R.P., Benny D.F., Fouling-resistant membranes for the treatment of owback water fromhydraulic shale fracturing: A pilot study, J. Memb. Sci., 437, pp. 265-275, (2013)
  • [8] Beckwith R., Hydraulic fracturing: The fuss, the facts, the future, J. Pet. Technol., 62, pp. 34-41, (2010)
  • [9] Michael B., How the technical differences between shale gas and conventional gas projects lead to a new business model being required to be successful, Mar. Pet. Geol, 31, pp. 3-7, (2012)
  • [10] Gu J., Zhong P., Shao C., Bai S., Zhang H., Li K., Effect of interface defects on shear strength and fluid channeling at cementinterlayer interface, J. Pet. Sci. Eng., 100, pp. 117-122, (2012)
1234