抗高温低密度弹塑性水泥浆体系研究与应用

doi:10.13809/j.cnki.cn32-1825/te.2020.03.016

摘要/Abstract

摘要：

塔河油田奥陶系井底温度高,缝洞发育,极易发生漏失,固井环空间隙小,常规的低密度水泥浆体系不能保证水泥环的密封完整性,不能满足勘探开发的要求。针对以上难点,优选了改性粉煤灰增强水泥石早期强度,复配高抗挤微珠提高水泥浆综合性能,优选高温弹塑性材料降低水泥石弹性模量,结合配套的固井外加剂,评价低密度弹塑性水泥浆体系。该水泥浆体系密度适用范围1.25~1.50 g/cm ³,API失水< 50 mL,流变性好,直角稠化,且水泥浆沉降稳定性好,并具有良好的力学性能,弹性模量可低至7 GPa,抗压强度>14 MPa,增强了水泥环在交变应力作用下的密封完整性。该体系在塔河油田中探1井和TP193井成功运用,整体固井质量良好,说明该体系可满足奥陶系易漏地层小间隙尾管的固井技术要求,应用前景良好。

关键词: 塔河油田, 固井, 高温, 低密度, 弹塑性, 水泥浆

Abstract:

In Ordovician of Tahe Oilfield, the bottom hole temperature is high, the seam hole is developed, the leakage easily occurs, and the annular clearance of cementing is small. Therefore, the conventional low density cement slurry system cannot guarantee the sealing integrity of cement sheath and meet the requirements of exploration and development. Aiming at the above difficulties, the modified fly ash is optimized to enhance the early strength of cement, the high anti-extrusion microsphere is compounded to improve the comprehensive performance of cement slurry, the high temperature elastoplastic material is optimized to reduce the elastic modulus of cement, and the low density elastoplastic cement slurry system is evaluated combined with the matching cementing additives. The density is applicable in the range of 1.25~1.50 g/cm ³, API water loss is less than 50 mL, the rheological properties is good, the right-angle is thickening, the cement slurry settlement stability is good, and the system has good mechanical properties. Meanwhile, the elastic modulus can be as low as 7 GPa and the compressive strength is greater than 14 MPa. All these things enhance the sealing integrity of cement sheath under the action of alternating stress. The applications of this system in well-Zhongtan-1 and well-TP193 of Tahe Oilfield are successful and the cementing quality are well, which indicate that the system can meet the cementing technical requirements of small clearance liner in the leaky formation of Ordovician and has a good application prospect.

Key words: cementing, high temperature, low density, elastoplastic, cement slurry

中图分类号:

TE256

彭金龙,李全双. 抗高温低密度弹塑性水泥浆体系研究与应用[J]. 油气藏评价与开发, 2020, 10(3): 104-108.

PENG Jinlong,LI Quanshuang. Research and application of high temperature low-density elastoplasticity cement slurry[J]. Reservoir Evaluation and Development, 2020, 10(3): 104-108.

图/表 8

表1

表2

表3

表4

图1

表5

图2

表6

参考文献 15

[1]	朱方辉, 李明星, 贺炳成, 等. 碳酸盐岩储层压井液漏失影响因素研究[J]. 钻井液与完井液, 2019,36(4):522-528.
	ZHU F H, LI M X, HE B C, et al. Factors affecting loss of kill mud used in carbonate rock reservoirs[J]. Drilling Fluid & Completion Fluid, 2019,36(4):522-528.
[2]	王瑞飞, 段雨安, 吕新华, 等. 深层高压低渗砂岩油藏应力敏感性实验[J]. 地质科技情报, 2014,33(1):90-94.
	WANG R F, DUAN Y, LYU X H, et al. Stress sensitivity experiment of sandstone reservoirs in deep section with high pressure and low-permeability[J]. Geological Science and Technology Information, 2014,33(1):90-94.
[3]	张云华, 蒋卓颖, 李雨威, 等. 粉煤灰低密度水泥浆在塔河油田堵漏中的应用[J]. 石油与天然气化工, 2018,47(1):79-82.
	ZHANG Y H, JIANG Z Y, LI Y W, et al. Utilization of fly ash low density cement slurry for plugging in Tahe oilfield[J]. Chemical Engineering of Oil and Gas, 2018,47(1):79-82.
[4]	杨海波, 曹成章, 冯德杰, 等. 新型低密度水泥减轻材料SXJ-1的研制及应用[J]. 石油钻探技术, 2017,45(4):59-64.
	YANG H B, CAO C Z, FENG D J, et al. The development and application of a new low density cement reducer SXJ-1[J]. Petroleum Drilling Techniques, 2017,45(4):59-64.
[5]	刘璐, 李明, 郭小阳. 一种新型低密度矿渣固井液[J]. 钻井液与完井液, 2016,33(6):68-72.
	LIU L, LI M, GUO X Y. A new low density slag cementing slurry[J]. Drilling Fluid & Completion Fluid, 2016,33(6):68-72.
[6]	侯力伟. 大庆油田低密度低温防窜水泥浆体系[J]. 钻井液与完井液, 2016,33(4):79-82.
	HOU L W. Low density low temperature anti-channeling cement slurry used in Daqing Oilfield[J]. Drilling Fluid & Completion Fluid, 2016,33(4):79-82.
[7]	田野, 代丹, 方国伟, 等. 提高粉煤灰低密度水泥浆体系低温性能的研究[J]. 科学技术与工程, 2013,13(21):6235-6238.
	TIAN Y, DAI D, FANG G W, et al. Research of how to improve fly ash low density slurry property in low temperature[J]. Science Technology and Engineering, 2013,13(21):6235-6238.
[8]	冯茜, 李明忠, 王成文. 高强低密度水泥浆体系及性能研究[J]. 钻采工艺, 2013,36(2):93-96.
	FENG Q, LI M Z, WANG C W. Study on performance of a low density cement slurry system with high compressive strength[J]. Drilling & Production Technology, 2013,36(2):93-96.
[9]	庄成宏, 王良才. 粉煤灰低密度水泥浆在塔河油田简化井身结构井中的应用[J]. 天然气勘探与开发, 2011,34(3):76-79.
	ZHUANG C H, WANG L C. Application of fly ash composite low-density cement slurry to some wells with simplified casing program in Tahe Oilfield[J]. Natural Gas Exploration and Development, 2011,34(3):76-79.
[10]	谭春勤, 刘伟, 丁士东, 等. SFP弹韧性水泥浆体系在页岩气井中的应用[J]. 石油钻探技术, 2011,39(3):53-56.
	TAN C Q, LIU W, DING S D, et al. Application of SFP elasto-toughness slurry in shale gas well[J]. Drilling Petroleum Techniques, 2011,39(3):53-56.
[11]	高元, 杨广国, 陆沛青, 等. 一种大温差弹韧性水泥浆[J]. 钻井液与完井液, 2019,36(1):97-101.
	GAO Y, YANG G G, LU PEI Q, et al. Study and application of a large temperature difference cement slurry with good elasticity and toughness[J]. Drilling Fluid & Completion Fluid, 2016,36(1):97-101.
[12]	齐奉忠, 刘硕琼, 沈吉云. 中国石油固井技术进展及发展建议[J]. 石油科技论坛, 2017,36(1):26-31.
	QI F Z, LIU S Q, SHEN J Y. Suggestions on CNPC cementing technological development[J]. Oil Forum, 2017,36(1):26-31.
[13]	杨广国, 陶谦, 高元, 等. 高温高压气井复合型水泥浆体系研究与应用[J]. 科学技术与工程, 2016,16(20):151-155.
	YANG G G, TAO Q, GAO Y, et al. Research and application of high temperature high pressure gas well complex cement slurry[J]. Science Technology and Engineering, 2016,16(20):151-155.
[14]	KULAKOFSKY D S, PAREDES J L, PAREDES J L. Ultralight weight cementing technology sets world’s record for liner cementing with a 5.4 lbm/gal slurry density[C]// paper SPE-98124-MS presented at the IADC/SPE Drilling Conference, 21-23 February 2006, Miami, Florida, USA.
[15]	KJELLSEN K O, LAGERBLAD B. Microstructure of tricalcium silicate and Portland cement systems at middle periods of hydration-development of Hadley grains[J]. Cement and Concrete Research, 2007,37(1):13-20. doi: 10.1016/j.cemconres.2006.09.008

序号	水泥浆配方	密度/ （g·cm^-3）	温度/ ℃	24 h抗压强度/MPa
1	基础配方+30 %常规粉煤灰	1.70	95	16.8
2	基础配方+30 %活性粉煤灰	1.70	95	24.6

漂珠含量/ %	养护前密度/（g·cm^-3）
漂珠含量/ %	0 MPa	80 MPa	100 MPa
30	1.37	1.38	1.39
45	1.24	1.25	1.26
60	1.17	1.19	1.20

SRBS加量/%	48 h抗压强度/MPa	48 h弹性模量/GPa
0	24.1	12.2
2	22.1	10.8
4	19.8	7.9
6	18.2	6.1
8	12.8	5.3

配方	密度/（g·cm^-3）	六速流变	API失水/mL	稠化时间/min	沉降稳定性（g·cm^-3）	流动度/cm
1	1.50	250/146/92/60/6/4	40（110 ℃）	201	1.50-1.50-1.51	22
2	1.35	223/174/99/60/8/5	38（120 ℃）	305	1.35-1.36-1.37	20
3	1.25	186/110/81/46/5/3	44（120 ℃）	328	1.25-1.26-1.28	18

配方	养护条件	24 h抗压强度/MPa	48 h抗压强度/MPa	48 h弹性模量/GPa
1	90 ℃×0.1 MPa	15.2	19.7	6.6
2	100 ℃×20.7 MPa	17.9	21.8	6.8
3	90 ℃×0.1 MPa	12.5	15.6	6.3