E3S Web Conf.
Volume 53, 20182018 3rd International Conference on Advances in Energy and Environment Research (ICAEER 2018)
|Number of page(s)||4|
|Section||Environment Engineering, Environmental Safety and Detection|
|Published online||14 September 2018|
The Application of Simple Controlled Pressure Drilling Technology in Yingxi Block
PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
Under the reservoir for exploration and development of Yingxi block in Qinghai oilfield, the chaigou formation is oil and gas reservoir complicated by the fault, and the exploration has been carried out over the years. The reservoir is a fracture - matrix pore dual medium type, with strong heterogeneity, fracture development degree, porosity and permeability variation range. The reservoir is very sensitive to wellbore pressure, the safety drilling density window is narrow, the conventional drilling leakage is frequent, the reservoir protection effect is poor, and the mechanical drilling rate is low. In 2016 six wells were selected for easy control and pressure drilling in the lower E23 formation. The technology experiment has obtained good application effect, which provides successful experience to solve the complex and improve the engineering quality and benefit.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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