Well Completion Technique with Screen Pipe Controlling Flow by Segments in Horizontal Well of Low Permeability Resevoirs in Shengli Oilfield

Zhao Yong; Yang Haibo; He Surong

doi:10.3969/j.issn.1001-0890.2012.03.004

Volume 40 Issue 3

May 2012

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Petroleum Drilling Techniques > 2012 > 40(3): 18-22. > DOI: 10.3969/j.issn.1001-0890.2012.03.004

Zhao Yong, Yang Haibo, He Surong. Well Completion Technique with Screen Pipe Controlling Flow by Segments in Horizontal Well of Low Permeability Resevoirs in Shengli Oilfield[J]. Petroleum Drilling Techniques, 2012, 40(3): 18-22. DOI: 10.3969/j.issn.1001-0890.2012.03.004

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Well Completion Technique with Screen Pipe Controlling Flow by Segments in Horizontal Well of Low Permeability Resevoirs in Shengli Oilfield

1.
Drilling Technology Research Institute, Shengli Petroleum Administration, Sinopec, Dongying, Shandong, 257017, China;
2.
Hekou Oil Production Plant, Shengli Oilfield Branch Company, Sinopec, Dongying, Shandong, 257200, China

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Received Date: January 07, 2012
Revised Date: May 04, 2012

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Abstract

Abstract

In order to slow down the rise of water cut after completion with screen pipe and prolong production life of horizontal wells,a completion method for horizontal wells with screen pipe controlling flow by segments has been proposed and applied in Shengli Oilfield.Its technical characteristics are analyzed as that,according to geological characteristics of the reservoir,different formations in oil layer are first isolated with external casing packers by segments;secondly,numerical simulation is used to calculate the reasonable daily fluid production rate of the well,then according to reservoir properties,the productivity distribution scheme is made to determine reasonable drainage area of each section;thirdly,flow-control screen pipe with different slot size and spacing is set in terms of the calculation results.The flow-control screen pipe can regulate production pressure drop of each section to achieve even liquid production in oil layer,and control bottom water flowing to horizontal wellbore evenly.The section flow-control tools such as external casing packer,flow-control screen pipe of variable slot size and spacing are introduced,as well as the well completion of flow control by segment.Field application effect of the completion method is analyzed.Up to now,the technique has been applied to more than 30 wells in Shengli Oilfield.Actual application indicates that it works well in controlling water cut and stablizing oil production.The water cut of these wells dropped 10% at the same period than those nearby wells which haven’t applied the technique.The technique can isolate different formations effectively and prolong water free or low water cut production period.
- horizontal well completion,
- screen pipe,
- segmented well completion,
- water cut,
- Shengli Oilfield

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