Research And Application On 3-D Cluster Horizontal Well Drilling Technology In BA Oil Field

With the development of oil drilling technology, horizontal drilling technology has become a relatively mature technology for the oil development in the oil industry, and is widely used in oil field development and construction. The combination of horizontal well technology and cluster well technology can take advantages of these two drilling technologies, to increase the reservoir development area, reduce the surface area of the wellsite construction and easy for the Management of oil gathering and transferring.There is rich oil reserves in BA oil field. This area is one of the largest oil output area around the world. It is also an important project of CNPC. Most of the wells in this region are three-dimensional cluster horizontal wells, which has the following drilling difficulties: complex formation, poor drillability, complex drilling pressure relationships, narrow mud weight window, anti-collision problem in the vertical sections, and very difficult to control the well trajectory.Through the research and application of three-dimensional cluster horizontal well technology of BA oil field, aiming at the difficulties of the three-dimensional cluster horizontal well trajectory control, complex geological conditions in this area, slow ROP and other technical problems, carry out the solutions of optimizing the design of well trajectory and taking precise control of the three-dimensional trajectory, MWD and LWD tool usage and improvement and drilling speed and other aspects of technology research, make breakthrough on three-dimensional cluster horizontal well trajectory control, reduce downhole accidents and the accelerate the drilling period with safety. Obtain a good result on scientific research and technology application. Make an economic and social effect of the practice, the three-dimensional cluster horizontal well technology has become international advanced level.This paper is intended to summarize the three-dimensional cluster horizontal well technology experience, form a technology template for the application of this technology in BA oil field, as well as other countries and regions. And then it will be applied in oil drilling industry as a mature technology more widely.The success of this subject achieves the first time application of three-dimensional cluster horizontal wells in BA oil field, forming a series of three-dimensional large-span transverse horizontal well trajectory precise control technology, achieve accelerating the drilling speed with safety, drilling cycles is reduced above 10%, a directional drilling technical template is formed.In this paper, the research process and the entire BA oil field directional drilling project practice are basically meanwhile, the first project contract has been successfully concluded, the successful completion of all 39 wells is the foundation and reference for the development of other projects in BA oil field, providing information and technical templates. The technology will be applied in projects. Three-dimensional cluster horizontal well technology successfully applied in BA oil field also make the C hinese directional drilling brand more famous and throughout the overseas directional drilling services market.