玛湖致密油工厂化压裂技术现场实践

Abstract

Abstract:

Reservoirs in the Triassic Baikouquan formation of Mahu sag in Xinjiang oilfield is a typically tight permeable formation. Considering the purpose of the development and comprehensive analysis, by the factory fracturing ideas of zipper fracturing and subdivision cutting volume fracturing by plug fracturing with multi-stages and multi-clusters, we explored and created a factory fracturing method that is used in 2 horizontal wells of 2 000 meters long in well area Ma131 by using pre-acid pretreatment, slick water multi-plug, low damage gel fracturing fluid which is causing a complex net volume on the role of stress interference. 26 and 22 stages fracture were respectively implemented in 2 wells with the fracturing fluid of 20 162 m ³ and 23 765 m ³ and proppant of 1 803 m ³ and 1 702 m ³, which leads to a good stimulation with the oil yield over 30 tons per day after hydraulic fracturing. The successful study and use of factory fracturing make a good foundation for the later stimulation of Mahu tight oil and provide safeguard for the scale effective development of tight oil in this area.

Key words: factory fracturing, tight oil, volume fracturing, fracturing operation, Mahu sag

CLC Number:

TE357

Xiangyang Yan,Yandong Wang,Tengfei Wang, et al. Field application of tight oil factory fracturing in Mahu sag[J]. Reservoir Evaluation and Development, 2018, 8(5): 70-76.

Figures/Tables 8

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References 21

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井号	深度/ m	直径/ mm	长度/ mm	渗透率/ 10^-3μm²	孔隙度,%	备注
玛 137井	3 255.23	25.24	57.11	1.123 476	5.22	0°
	3 255.23	25.27	40.47	0.028 222	7.17	45°
	3 255.23	25.21	45.02	0.538 400	4.69	水平
	3 256.35	25.26	52.26	0.079 223	5.54	水平-1
	3 256.35	25.25	60.14	1.653 787	5.43	水平-2
	3 256.35	25.22	54.24	0.215 505	5.12	水平-3

井号	层位	取心深度/m	岩性	围压/MPa	实验结果
井号	层位	取心深度/m	岩性	围压/MPa	杨氏模量/MPa	泊松比
玛13	T₁b₃	3 108	砂砾岩	10	24 331	0.212
玛133	T₁b₂¹	3 300	砂砾岩	10	27 354	0.190
玛131		3 190	砂砾岩	10	25 420	0.220
玛139		3 294.87~3 303.04	砂砾岩	30	27 180	0.188
玛137		3 262.83~3 265.96	砂砾岩	30	27 990	0.207
玛154		3 054.02~3 057.88	砂砾岩	30	22 790	0.249

井号	层位	解释深度/m	最大主应力/MPa	最小主应力/MPa	两向应力差/MPa
玛133	T₁b₂¹	3 299~3 314	64	53	11.0
玛132		3 260~3 280			13.8
玛137		3 262~3 265	74	58	16.0
玛139		3 310~3 318	71	55	17.0
玛154		3 054~3 057	65	50	15.0

层位	断块	中部深度/m	地层压力/MPa	压力系数	中部温度/℃
T₁b₃	玛131	3 042.8	38.67	1.27	75.03
T₁b₂¹	玛131	3 092.8	34.53	1.12	76.06
T₁b₂¹	玛133	3 286.5	35.97	1.09	80.07

井序号	施工段数	酸量/m³	滑溜水/m³	冻胶/m³	总液量/m³	平均单段液量/m³	（40/70目）/m³	（20/40目）/m³	总砂量/m³	平均单段砂量/m³
1	26	157.6	5 391	14 614.2	20 162.6	775.5	62	1 741	1 803	69.35
2	22	120.6	10 017.2	13 627.7	23 765.5	1 080.25	41.25	1 660.7	1 702	77.36

Field application of tight oil factory fracturing in Mahu sag

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