Strengthening parameter drilling method suitable for Sichuan and Chongqing areas

Abstract

The invention discloses a strengthening parameter drilling method suitable for Sichuan and Chongqing areas. The stratigraphic sequence of the Sichuan and Chongqing areas sequentially comprises a Jialing River group, a Changxing group, a Longtan group, a Hanjiadian group and a Longmaxi group from top to bottom. Well bottom bit pressure, top drive rotating speed, drill bit rotating speed, displacement and drilling fluid density are collected in real time. The mechanical drilling speed is calculated through the strengthening parameter model, and the mechanical drilling speed corresponding to the well bottom drilling pressure, the top drive rotating speed, the drill bit rotating speed, the displacement and the drilling fluid density which are collected in real time is obtained; the boundary condition of each stratum is set, the top drive rotating speed is adjusted, the boundary conditions are combined until the optimal mechanical drilling speed is calculated, and the well bottom drilling pressure, the top drive rotating speed and the displacement which are correspondingly collected according to the optimal mechanical drilling speed are obtained, so as to reduce the abrasion of a drill bit, improve the mechanical drilling speed, shorten the drilling period and reduce the drilling cost.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering equipment development, in particular to an enhanced parameter drilling method suitable for the Sichuan-Chongqing area. Background technique [0002] At present, domestic shale gas development has entered a stable stage, but there is still a big gap compared with North American shale gas technology. The main gap lies in North American technology for increasing production speed. The speed-up technology in North America mainly adopts enhanced parameters, and adopts high bit pressure, large displacement and high speed for speed-up drilling. The domestic geology is complex, multi-stage tectonic movements are superimposed, mountainous landforms, underground structures are complex, and fractures are developed. The equipment is mainly equipped with a pressure level of 35MPa, and some high-pressure areas use 70MPa. Domestic shale gas exploitation is facing the biggest speed-up problem. In th...

AI Technical Summary

Problems solved by technology

At present, there is no effective strengthening parameter method in the field construction, and there is no model simulation analysis, which leads to rapid wear of the drill bit, low ROP, low drilling efficiency, long drilling cycle, and high final drilling cost.

Images