Method for testing thick oil horizontal well
A test method and technology for horizontal wells, which are applied in the directions of surveying, earthmoving, wellbore/well components, etc., can solve the problems of normal production limitation, measure cost and high risk of shallow heavy oil horizontal wells, and achieve low production costs and economical benefits. Social benefits and the effect of broad application prospects and easy to manufacture
Active Publication Date: 2012-08-15
XINJIANG HUALONG OILFIELD TECHNOLOGICAL LIABILITY +1
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However, there is still a lack of on-site supporting technology for the exploitation of shallow heavy oil horizontal wells in the oilfield, and the cost and risk of the measures are high. Under such working conditions, for horizontal wells with oil tubing thermal recovery (tubing inner diameter Φ43-50mm and different diameters, temperature 260-320°C), the current common testing process cannot be tested in this production state at all, resulting in the shallow heavy oil horizontal well The normal production of
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[0010] A method for testing heavy oil horizontal wells. Firstly, a cable 10 for testing oil well temperature and pressure is placed in a steel pipe 3 , and the length of the steel pipe 3 matches the length of the cable 10 . Secondly, one end of the steel pipe 3 is coiled on a winch 2 with a diameter of 2-3m, which is installed on a mobile chassis 1 and driven to rotate by a hydraulic motor. Devices such as a control room are also arranged on the mobile chassis 1, and the cables 10 are connected with the control computer in the control room.
[0011] The steel pipe 3 is made of stainless steel SS316L, the wall thickness of the steel pipe 3 is at least 1.5mm, and the compressive strength of the steel pipe 3 is at least 1200kg / m; the insulation resistance of the cable 10 is greater than 300MΩ, the temperature resistance is 400°C, and the pressure resistance is 40MPa.
[0012] The winch 2 can be driven to rotate by a hydraulic motor through a reducer, and is used for receiving and...
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The invention discloses a method for testing a thick oil horizontal well, which comprises the following steps: firstly, placing a cable for testing the temperature and pressure of the oil well into a steel pipe which is matched with the cable in length; secondly, coiling one end of the steel pipe on a winch which is arranged on a movable chassis and driven by a hydraulic motor to rotate, passing the other end of the steel pipe through a cable driving device, and driving the steel pipe to enter into the thermal extraction thick oil horizontal well with the cable driving device; and finally recording temperature and pressure values at gas injection and oil extraction stages of the full well section every 3 to 10 meters. The method of the invention can test the temperature, pressure and the like in the thick oil horizontal well in a production state so as to ensure the normal production of the oil well.
Description
technical field [0001] The invention relates to a heavy oil horizontal well testing method used in oil field production. Background technique [0002] Because horizontal wells can greatly increase single well production and oil recovery, coupled with the improvement of drilling technology and the reduction of drilling costs, this technology has been widely used in the development of various oil and gas reservoirs in the world, and significant economic effects have been achieved. The application scale is increasing year by year, and the relevant supporting technologies are becoming more and more perfect. At present, it has also been developed and applied on a large scale in heavy oil reservoirs, and the application effect is remarkable. However, there is still a lack of on-site supporting technology for the exploitation of shallow heavy oil horizontal wells in the oilfield, and the cost and risk of the measures are high. Under such working conditions, for horizontal wells w...
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IPC IPC(8): E21B47/06
Inventor 张学鲁吴坚强赵克勤庞涛罗仁全王树斌黄晓明
Owner XINJIANG HUALONG OILFIELD TECHNOLOGICAL LIABILITY