During nearly 25 years of water injection development in Gaotaizi reservoir LHP oilfield, due to poor physical properties, adaptability well pattern and difficulty establishing effective displacement between oil Wells, linear injection, infill adjustment refracturing tests have been carried out successively. Although certain effects seen, the are short unsatisfactory. In this paper, microscopic...

Determination of the borehole and fracture initiation positions is the main aim of a borehole stability analysis. A wellbore trajectory optimization with the help of the mud pressure may be unreasonable since the mud pressure can only reflect the degree of difficulty for the initial damage to occur at the wellbore rather than the extent of the wellbore damage. In this work, we investigate...

This paper presents attempts to reduce the concentration of organic pollutants in oilfield produced wastewater before its discharge into natural water bodies or reinjection wells. The contaminant content was significantly decreased by treatment, based on solid phase adsorption, photocatalytic degradation molecules and chemical oxidation oily compounds. study conducted with real wastewater, whic...

Wellbore instability is the primary technical problem that restricts low-cost drilling of long-interval horizontal wells in shale formation Jidong Oilfield. Based on evaluation mineral composition, structure and physicochemical properties shale, this paper investigates mechanical behavior characteristics under fluid action by combining theoretical analysis, experimental numerical simulation. Du...