The technical focus of drilling operations is changing to oil and gas reservoirs with higher difficulty factors such as low permeability fracture. During the process, in deep complex formations are prone overflow leakage complications. Leakage problems will change performance fluid wellbore, impacting wellbore pressure, causing accidents stuck collapse. In order improve level control over risk ...

A reservoir in Block of an oil field is a new layer series the area, and horizontal well has been deployed for first time around development target third section reservoir. Compared with layers old structure more complex, changes rapidly, prediction sand-laden mud difficult, tracking adjustment wells while drilling difficult. In view above problems, order to ensure effect, we have carried out b...

Drilling operations of petroleum generate oily wastes. The disposal of a significant amount of oil-based drill muds has caused soil contamination and critical environmental impacts in the last decades.The current study aimed to investigate the potential of microbial remediation for an aged oil-based drilling waste and to monitor the fluctuation in microbial population throughout a ...

Abstract Co-treatment of drilling muds with municipal wastewater in the reactors operating on activated sludge principle constitutes a potentially safe method their disposal. The is based process biological degradation pollutants by assemblages organisms (prokaryotic and eukaryotic), which include different species described as functional trophic groups. When ecosystem bioreactor equilibrium, h...

Wellbore instability is a quite common event during drilling, and causes many problems such as stuck pipe and lost circulation. It is primarily due to the inadequate understanding of the rock properties, pore pressure, and earth stress environment prior to well construction. This study aims to use the existing relevant logs, drilling, and other data from offset wells to construct a precise mech...

The design trajectory parameters of 3D horizontal wells in X gas field are not uniform, the construction is random, and lack standardization enough to achieve rapid drilling. Based on analysis data difficulties completed well, according different types, by standardizing drilling tool assembly well design, making full use characteristics formation law, using supporting tools control sand carryin...