断层岩发生张性破裂所需压力预测及油田安全生产建议: 以秦皇岛33-1南和33-2油田明下段控藏断裂为例

付广; 刘哲; 胡光义; 范廷恩; 王超; 吕延防

doi:10.3799/dqkx.2014.115

断层岩发生张性破裂所需压力预测及油田安全生产建议: 以秦皇岛33-1南和33-2油田明下段控藏断裂为例

doi: 10.3799/dqkx.2014.115

1.
东北石油大学地球科学学院, 黑龙江大庆 163318
2.
中海油研究总院, 北京 100027

基金项目:

国家自然科学基金 41372154

国家自然科学基金 41372153

东北石油大学校青年科学基金 2013NQ127

详细信息

作者简介:
付广(1962-), 男, 教授, 博士生导师, 主要从事油气藏形成与保存研究.E-mail: fuguang2008@126.com

中图分类号: TE112
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出版历程
- 收稿日期: 2013-12-25
- 刊出日期: 2014-09-01

Forecasting of Pressures Required in Tension Fracture of Fault Rock and Suggestions for Safe Production in Oilfield: An Example from Faults Controlling Oil Accumulation of N₁m₁ in Qinhuangdao 33-1S and Qinhuangdao 33-2 Oilfields

1.
College of Earth Sciences, Northeast Petroleum University, Daqing 163318, China
2.
Research Center of CNOOC, Beijing 100027, China

摘要

摘要: 为了确保秦皇岛33-1南和33-2明下段油田的安全生产, 在实测围岩抗压强度和区域应力场特征研究的基础上, 采用把断层岩看作倾斜岩层, 再与围岩对比的方法, 建立了一套断层岩发生张性破裂所需压力的预测方法, 并利用该方法对秦皇岛33-1南和33-2油田主要目的层——明下段控藏断裂断层岩发生张性破裂所需压力进行了预测.结果表明: 秦皇岛33-1南和33-2油田明下段控藏断裂断层岩发生张性破裂所需压力为25.6~31.3 MPa, 平均为29.4 MPa.如果油田开发过程中注水压力经过从注水井至断裂带压力损失后仍小于25.6~31.3 MPa时, 秦皇岛33-1南和33-2明下段油田可安全注水生产; 否则将造成该油田中的断裂发生张性破裂, 油沿断裂向上逸散至海底.
- 断层岩 /
- 张性破裂 /
- 注水压力 /
- 预测方法 /
- 围岩 /
- 秦皇岛油田
Abstract: To ensure safe production of Qinhuangdao 33-1S and 33-2 oilfields, based on the study of test of crushing resistance intensity and regional stress characteristics, a method forecasting pressure required in tension fracture of fault rock is proposed in this paper by using fault rock as a dip rock and contrasting between fault rock and surrounding rock. The new method is tried in forecasting pressures required in tension fracture of fault rock of faults controlling oil accumulation of N₁m₁ in Qinhuangdao 33-1S and Qinhuangdao 33-2 oilfields. Results indicate that pressures required in tension fracture of fault rock of faults controlling oil accumulation of N₁m₁ is 25.6-31.3 MPa, with the average value of 29.4 MPa. It is found that safe production can be guaranteed in Qinhuangdao 33-1S and Qinhuangdao 33-2 oilfields if water injecting pressure is smaller than 25.6-31.3 MPa after it is reduced from water injection well to fault. Otherwise, oil might escape to sea bottom from fault.
- fault rock /
- tension fracture /
- water injecting pressure /
- forecasting method /
- surrounding rock /
- Qinhuangdao oilfield

HTML全文

图 1 秦皇岛33-1南和33-2油田明下段油气与断裂分布关系

Fig. 1. Distribution relation between oil-gas and faults in Qinhuangdao 33-1S and Qinhuangdao 33-2 oilfields

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图 2 QHD33-1-1井岩心发生张性破裂所需压力与其声波时差和泥质含量关系

Fig. 2. Relation among pressure required in tension fracture and interval transit time mudstone content of cores in well QHD33-1-1

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图 3 QHD33-1-1井岩心声波时差与其埋深和泥质含量关系

Fig. 3. Relation among interval transit time and depth, mudstone content of cores in well QHD33-1-1

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表 1 QHD33-1-1井10块岩心样品抗压强度实验结果

Table 1. Experiment result of crushing resistance intensity of 10 cores in well QHD33-1-1

样号	Z(m)	S_c(MPa)	μ	B(%)	S(MPa)	P_w(MPa)	S_t(MPa)	δ₂(MPa)	δ₃(MPa)	δ₁(MPa)	K	P_f(MPa)
1	1 240.2	67.9	0.12	35.0	25.7	12.2	5.7	29.2	21.8	26.0	0.59	28.21
2	1 240.5	68.5	0.12	35.0	25.7	12.2	5.7	29.2	21.8	26.1	0.58	28.27
3	1 240.6	68.2	0.11	35.0	25.7	12.2	5.7	29.2	21.8	26.1	0.60	28.25
4	1 240.7	68.2	0.13	35.0	25.7	12.2	5.7	29.2	21.8	26.1	0.55	28.25
5	1 240.8	68.2	0.13	35.0	25.7	12.2	5.7	29.2	21.8	26.1	0.56	28.25
6	1 241.1	68.2	0.13	35.0	25.7	12.2	5.7	29.2	21.8	26.1	0.57	28.26
7	1 269.8	22.6	0.12	28.0	26.3	12.5	1.9	29.9	22.4	26.7	0.58	24.95
8	1 269.7	22.6	0.12	28.0	26.3	12.5	1.9	29.9	22.4	26.7	0.58	24.95
9	1 270.1	22.6	0.14	28.0	26.4	12.5	1.9	29.9	22.4	26.7	0.54	24.96
10	1 316.3	22.6	0.14	32.0	27.3	13.0	1.9	31.0	23.2	27.6	0.55	26.03

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表 2 秦皇岛33-1南和33-2油田明下段控藏断裂断层岩发生张性破裂所需压力预测结果

Table 2. Forecasting of pressure required in tension fracture of fault rock of faults controlling oil accumulation of N₁m₁ in Qinhuangdao 33-1S and Qinhuangdao 33-2 oilfields

区块	砂体名称	控圈断裂	控砂范围		SGR(%)	倾角(°)	A_c(3.28 μs/m)	P_f(Mpa)	压力系数
33-1S	1-3-NmI-1062	F38	-1 051.0	-1 075.5	49.1	61.1	35.6	30.6	3.0
		F14	-1 043.0	-1 055.5	69.7	59.9	24.4	30.8	3.0
		F15	-1 035.0	-1 045.0	85.6	58.1	15.2	31.0	3.1
	1-3-NmI-1098	F33	-1 064.0	-1 078.0	85.5	60.1	23.9	30.6	2.9
		F12	-1 082.5	-1 090.0	66.7	60.2	37.5	30.3	2.8
		F22	-1 079.0	-1 085.0	64.7	56.3	37.3	30.3	2.9
		F19	-1 077.0	-1 081.0	78.1	58.3	31.0	30.4	2.9
	1-3-NmI-1156	F38	-1 149.0	-1 161.0	39.7	61.1	69.0	29.2	2.6
		F19	-1 159.0	-1 163.0	77.8	58.3	55.6	29.3	2.6
		F15	-1 157.0	-1 166.0	41.3	58.1	70.7	29.1	2.6
	1S-1-NmI-1061	F12	-1 037.0	-1 043.0	66.5	60.2	24.0	30.9	3.0
	1S-1-NmI-1061	F15	-1 039.5	-1 053.5	76.7	58.1	20.4	30.9	3.0
	1S-3-NmI-1160	F28	-1 130.5	-1 143.0	68.9	59.1	50.9	29.6	2.7
	1S-3-NmI-1160	F30	-1 133.0	-1 155.0	48.9	59.5	60.3	29.5	2.7
	3-5-NmI-1084	F14	-1 048.0	-1 063.5	88.8	59.9	17.7	30.9	3.0
		F48	-1 042.0	-1 052.0	95.4	55.2	13.1	31.0	3.0
		F8	-1 076.0	-1 081.0	60.8	58.8	38.1	30.3	2.9
		F7	-1 071.0	-1 096.5	62.5	60.7	35.9	30.4	2.9
		F16	-1 063.5	-1 071.0	55.7	58.8	36.6	30.5	2.9
		F1	-1 079.0	-1 102.5	62.5	58.7	38.3	30.3	2.9
	1-3-NmⅡ-1192	F14	-1 171.5	-1 187.0	52.8	59.9	70.1	29.0	2.5
	1-3-NmⅡ-1226	F38	-1 215.5	-1 221.0	45.2	61.1	86.5	28.3	2.4
		F32	-1 202.5	-1 213.0	58.8	59.7	76.8	28.6	2.4
		F33	-1 211.0	-1 223.0	58.4	60.1	79.5	28.4	2.4
	1S-2-NmⅡ-1237	F28	-1 176.5	-1 195.0	88.8	59.1	56.1	29.1	2.5
		F30	-1 176.5	-1 205.0	87.5	59.5	56.7	29.1	2.5
		F12	-1 209.0	-1 218.5	51.7	60.2	81.8	28.4	2.4
	1S-2-NmⅡ-1292	F28	-1 267.0	-1 271.0	59.2	59.1	95.9	27.7	2.2
	1S-2-NmⅡ-1292	F30	-1 273.0	-1 281.5	68.1	59.5	93.9	27.6	2.2
	1-3-NmⅢ-1334	F12	-1 313.0	-1 318.0	86.4	60.2	98.0	27.2	2.1
	1-3-NmⅢ-1334	F30	-1 319.0	-1 323.0	84.7	59.5	100.5	27.1	2.1
33-2	2-1-NmI-1064	F8	-1 028.5	-1 046.0	86.1	58.8	13.0	31.1	3.1
	2-1-NmI-1064	F10	-1 028.5	-1 039.5	86.6	64.6	12.8	31.1	3.1
	2-2-NmI-1064	F8	-1 012.2	-1 023.0	71.4	58.8	14.5	31.3	3.1
	2-2-NmI-1064	F10	-1 064.0	-1 076.5	56.9	64.6	36.2	30.5	2.9
		F6	-1 058.0	-1 081.5	47.7	57.8	38.3	30.5	2.9
		F1	-1 332.5	-1 345.0	77.3	58.7	107.7	26.9	2.1
	2-1-NmI-1340	F8	-1 299.0	-1 302.0	91.0	58.8	91.8	27.4	2.2
		F10	-1 299.0	-1 302.0	89.9	64.6	92.3	27.4	2.2

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