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Dagang Oilfield: secondary development produces a second leap

Dagang Oilfield: secondary development produces a second leap

(Summary description)The key to the successful secondary development of Dagang oilfield is to accurately understand the oil and gas development to two meters and study the object to the micro-structure of single sand body.The result is equivalent to the discovery of 40 million tons of reserves,said Tao Ziqiang,an oilfield technology expert.

Dagang Oilfield: secondary development produces a second leap

(Summary description)The key to the successful secondary development of Dagang oilfield is to accurately understand the oil and gas development to two meters and study the object to the micro-structure of single sand body.The result is equivalent to the discovery of 40 million tons of reserves,said Tao Ziqiang,an oilfield technology expert.

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The key to the successful secondary development of Dagang oilfield is to accurately understand the oil and gas development to two meters and study the object to the micro-structure of single sand body.The result is equivalent to the discovery of 40 million tons of reserves,said Tao Ziqiang,an oilfield technology expert.
The personage inside course of study says,secondary development is a revolution in oilfield development history,at the same time also be the eternal theme of upstream development business development.
On November 18,the 24th fault block in the first area of Daganggangxi Oilfield produced 304 tons of oil per day,a record high since it was put into development in 1966.This is the result of the implementation of the concept of secondary development and the continuous improvement of oil recovery through various technical means in Dagang Oilfield.This for the annual output of 5 million tons dagang oilfield,the contribution is not small.
In 2008,Petrochina put forward the idea of secondary development of old oil fields.At that time in dagang oilfield exploration and development Research Institute,someone said:"Dagang oilfield has been developed for more than 40 years,is an old oilfield with high water cut and high recovery degree,but the underground situation of small fault blocks such as West Port is complex,it is not easy to talk about secondary development?Some experts said:"We have technical advantages,if we do not do configuration research,not a thorough secondary development."This idea,a stone stirred up a thousand waves.
New technology reconstructs the new system
At the beginning of 2009,Qikou No.1 Office of Dagang Oilfield Exploration and Development Research Institute undertook the important task of the research on the secondary development of The West Oilfield,and the research project became one of the key pilot projects of the secondary development of the old oilfield of the joint-stock company.After that,the oilfield in the east of Hong Kong and the oilfield in the area of 70 square kilometers were included in the research scope.
The technical direction is the main factor that determines the effect of secondary development.Facing the complicated old data,how to construct the research system?The Research institute of Exploration and Development has put forward a"triple"technology roadmap.
The first is to reconstruct the underground cognition system.Repetition of acquisition,processing and interpretation of seismic data,high resolution 3 d seismic data,and carries on the new 3 d seismic data of high resolution,high density of fine structure,describe the fluvial facies reservoir internal structure,single sand bodies and put forward the research concept,single sand bodies should allow the precision by the structure into the single sand body.
The second is to reconstruct the well pattern.With the reconstruction of well pattern structure as the core,from the second round,the well spacing should be intensified to about 200 meters.The reorganization and optimization of the well pattern,combined with the wide application of new technology,improve the degree of water drive control,and ultimately greatly improve the recovery factor.
The third is to reconstruct the surface technological process.The large-scale surface process simplification and optimization with Gangxi oilfield as the core establishes a green channel for secondary development.
By using high-resolution 3D seismic data and high-density well pattern data,well seismic collection and dynamic and static combination,researchers comprehensively apply various technical means to improve the understanding accuracy of complex fault-block reservoir and the understanding reliability degree of residual oil distribution.Through the optimization and recombination of development layer and injection-production well pattern,as well as the application of deep flooding technology,the degree of water flooding control and water flooding sweep coefficient of reservoir are improved,and the drilling rate and single well production of new well are improved steadily.
The end of the year,"Hong Kong west oil secondary development scheme research"and"Hong Kong west complex fault block reservoir with high water cut period fine potential in industrial test"project so as to obtain better effect,and the expert group review and acceptance through co.LTD.,the second-round development and study of dagang oilfield technology won the high praise in the industry,provides the bohai bay and similar old oilfield development guide,the pilot demonstration effect.
New achievements accumulate new experience
Senior technical experts in dagang oilfield tao himself said:"strengthen the application of 3 d seismic data,thin sand body internal structure,the quantitative distribution of remaining oil potential research,deepen the development well pattern formation restructuring,optimization techniques of oil displacement system,curing ground supporting process,seemingly simple'six'technical countermeasures,is the crystallization of scientific researchers have worked."
These technical countermeasures make the secondary development of Dagang oilfield a tiger with wings added.In The Dongyi area and Gangxi Oilfield,397 new Wells are optimized for secondary development.It is estimated that after the implementation of the plan,the new production capacity will be 531,200 tons,and the cumulative increase of crude oil output in 10 years will be 3.399 million tons,which will increase the water flooding recovery rate by more than 5 percentage points,setting the record for the completion of new well optimization in a short period of time.The project of the secondary development of Gangxi Oilfield was awarded the excellent Project award by the joint-stock company.
Gangdong and Gangxi oilfield have successively implemented 129 new Wells,with a new production capacity of 264,300 tons and a total oil production capacity of 178,900 tons.High-yielding Wells with an average daily output of 80 tons have been drilled in Gangdong oilfield.The second fourth fault block in Area I of Gangxi Oilfield produces 304 tons of oil per day,a record high since it was put into development in 1966,and its water content drops by more than 12 percentage points,returning to the mid-water-cut development stage in the early 1980s from the high-water-cut development stage.
The degree of understanding of oil and gas development is accurate to two meters,and the research object is accurate to the micro-structure of single sand body.These are the highlights of the secondary development of Dagang oilfield,and also the secret of its success.The result is equivalent to the discovery of 40 million tons of reserves,Tao said.
During the report on the secondary development plan of the 11th Five-Year Plan,academicians of the Chinese Academy of Sciences and the Chinese Academy of Sciences commented that the secondary development of Dagang Oilfield is"the most detailed work with the deepest research depth".

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