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Liaoning, China

Kuang X.,No. 91 Huibin Street
Drilling Fluid and Completion Fluid | Year: 2015

An acrylic resin polymer was synthesized with monomers such as butyl acrylate, octadecyl acrylate, acrylic acid and styrene through modified emulsion polymerization. A modified organophilic silica flour was used as condensation nucleus. This synthesized polymer is a polymer with nuclei, and is used as a plugging and sealing agent in oil base drilling fluids to prevent mud losses and borehole wall collapse. It is of almost no influence on the rheology of oil base muds, and can greatly improve the capacity of oil base muds to build high quality mud cakes and the emulsion stability of oil base muds. Cores flooded with oil base mud formulated with this polymer have pore throats plugged by more than 75%, and breakthrough pressure can be as high as 10 MPa or higher. This plugging and sealing agent has excellent high temperature stability, the plugging performance remains almost unchanged before and after aging. As laboratory experiments indicated, this plugging and sealing agent is better than asphalt products. ©, 2015, North China Petroleum Administration Drilling Technology Research Institute. All right reserved. Source


Li J.,No. 91 Huibin Street | Qian Z.,No. 91 Huibin Street | Guan J.,No. 91 Huibin Street | Guo L.,No. 91 Huibin Street | Kuang X.,No. 91 Huibin Street
Drilling Fluid and Completion Fluid | Year: 2015

Well Shenping-1 is the first horizontal exploration well having oil shale and argillaceous dolomiteinterbeds reservoirs. The existence of oil shale presents drilling difficulties such as borehole instability, well path control difficult in reservoir drilling, environmental issue and low ROP, to name but a few. A whole oil base drilling fluid was developed for use on Well Shenping-1. It has a density of 1.55 g/cm3 and temperature resistance to 150℃. As a whole oil mud, it has good rheology, inhibitive capacity, plugging capacity, contamination resistance, lubricity and high temperature stability, thus is able to control the swelling and sloughing of the oil shale when in contact with water. Shenping-1 had an average ROP 1.6 times that of the wells drilled nearby, and time efficiency of drilling was increased by 30%. ©, 2014, North China Petroleum Administration Drilling Technology Research Institute. All right reserved. Source


Wang J.,No. 91 Huibin Street | Hong W.,No. 91 Huibin Street | Guan J.,No. 91 Huibin Street | Zhu C.,No. 91 Huibin Street | Sun Y.,No. 91 Huibin Street
Drilling Fluid and Completion Fluid | Year: 2015

A high performance foam LCM mud, CLPA-1, was developed for use in the Block Lengjia where lost circulation posed difficulties to drilling the old, fractured formations. Lost circulation did not occur in four wells in this area drilled with CLPA-1, and in another three wells lost circulations were stopped first time when they occurred, with no subsequent lost circulation happened. Field application proved that the CLPA-1 foam mud was effective in lost circulation control in the area, where mud losses into fractured formations had long been common. ©, 2014, North China Petroleum Administration Drilling Technology Research Institute. All right reserved. Source

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