Abstract: In this paper the formation characteristics of the deep water areas in GOM, Brazil and West Africa are analyzed. Characteristics of the salt formation and technical challenges encountered in drilling operations are introduced with emphasis. Requirements on drilling fluid design for use in drilling t...
Abstract: The development of environmentally friendly high temperature drilling fluid filtration reducer is an important subject at present, because it plays a key role in dissolving environment pollution. This paper summarizes the progress made at home and abroad in the study of environmentally friendly dril...
Abstract: Deep water well, extended reach well, HTHP well and well with narrow safe drilling window are imposing higher and more rigorous requirements on the performance of drilling fluids, especially those requirements such as the rheology, wall building property, settling stability and reservoir protection ...
Abstract: A high performance synthetic drilling fluid has been developed to deal with narrow safe drilling window associated with high temperature high pressure wells. The synthetic base drilling fluid was formulated with three main additives:a new high temperature emulsifier which is resistant to high temper...
Abstract: The Longmaxi shale in Chuanyu area is brittle, and is full of micro-fractures and vugs. Challenges encountered during drilling operations are borehole instability and pipe sticking resulted from borehole sloughing. In this paper, the technical difficulties in using the high performance water base dr...
Abstract: With the advancement of shale gas drilling to deeper reservoirs, the density of drilling fluid has approached 1.75 g/cm3, and the density of cement slurry approached 1.85-1.89 g/cm3. To improve the quality of well cementing and prevent the losses of cement slurry, the pressure bearing capacity of th...
Abstract: Lost circulation is one of the main technical roadblocks to safe, fast and efficient drilling in Shunbei oilfield. Analysis of the field operation data concerning lost circulation showed that the Permian system in Shunbei oilfield is highly heterogeneous and full of fractures of different sizes and ...
Abstract: A supramolecular chemical lost circulation material (LCM) has been prepared based on the supramolecular chemistry theory recently developed. This LCM can be used to control mud losses at different depths. It forms gels of different strengths and elasticity at different temperatures. Lost circulation...
Abstract: Deficiencies have been found of the drilling fluid lubricants used presently, such as poor high temperature stability, complex preparation process, severe foaming and high level of fluorescence etc. These deficiencies have hindered drilling horizontal wells with longer horizontal displacement, and d...
Abstract: Consistent rheology water base drilling fluid, rarely reported presently, is a new working fluid used for deep water drilling. The rheological behavior and the consistent rheology mechanisms were studied by measuring the properties and analyzing the rheological model of the consistent rheology drill...
Abstract: Wellbore collapse in the carbargilite section in Changqing gas field has resulted in frequent occurrence of downhole troubles and sidetracking. To resolve these problems, rock samples taken from the carbargilite formation were studied for the microstructure, cation exchange capacity, mineral composi...
Abstract: Abundant shale gas resource has been found in Yanchang, and the exploration and development of the resource is in research stage. The geology of the shale gas reservoirs is complex, and borehole collapse in horizontal drilling has always been a problem. The use of oil base mud to control borehole wa...
Abstract: The north Troyes oilfield (Kazakhstan) in recent years has been carrying out the "integrated" drilling mode which imposes new challenges to drilling fluid. To deal with the challenges, a saturated polymer sulfonate drilling fluid was formulated based on the analyses of geology of the formations and ...
Abstract: Well ZX105 is the first exploratory horizontal well drilled in Zhixinchang structure in western Sichuan. This well, targeted the lower Shaximiao formation, was designed to drill to measured depth of 3,726 m (TVD 2,506 m). The designed length of the horizontal section was 1,001 m. The casing for the ...
Abstract: Conventional ultra-fine minerals are used to improve the degree of density of cement powders. The use of these ultra-fine minerals, however, leads to increase in the amount of water required, and the results in enhancing the degree of density and compressive strength of the set cement are not as goo...
Abstract: Shallow hydrate zones are often encountered in offshore deep drilling. Conventional low temperature cement releases quite large amount of heat which, during well cementing, will negatively affect the quality of well cementing because the heat released causes the hydrate zones to destabilize. A speci...
Abstract: With the advance of high temperature deep well and ultra-deep well development in Sichuan and Chongqing, the compatibility of cement slurry for well cementing with drilling fluid, which is probable to cause cement slurry to become thickened and agglomerate, is becoming more and more protruding. A po...
Abstract: Spatial fracture-network generated fracturing and the characteristics of shale itself produce large amount of nano-sized fractures in the shale. The effect of water retained in shale on desorption and migration of methane was studied through simulation, experiment and data from filed operations. Cal...
Abstract: In hydraulic fracturing operations, the distribution of proppants in the fractures play an important role to the results of the stimulation job. Laboratory experiments have been conducted to study the distribution of settled sand bank of low density proppants in fresh water, in 0.08% HPG solution an...
Abstract: 16 tracers have been developed using lanthanide series metals, EDTA·2Na, DTPA and NaOH etc. The tracers were tested with ICP-AES for the detection limit of each element and the interference among the elements. It was concluded that the detection limits of the 16 tracers are between 10 mg/m3 and 80 m...
Abstract: With increasing scale in reservoir fracturing, more rigorous requirement has been placed on chemical tracers and their detection whose sensitivity and accuracy are both affected by the addition of fracturing fluid additives. In laboratory studies, two simulated fracturing fluid samples formulated wi...
Abstract: Drilling fluids with good thermal stability, settling stability, CO2 contamination resistance and reservoir protection are required to drill wells in the Ying-Qiong Basin in South China Sea where high temperature, high pressure, CO2, and low porosity/low permeability prevail. Downhole troubles have ...
Governed by: China National Petroleum Corporation Ltd
Editor-in-Chief:Shi-chun Chen(Engineer Technology Research Institute,BHDC)
Deputy Editor-in-chief:
Gui-juan Wang(Engineer Technology Research Institute,BHDC)Qiang Ren(Engineer Technology Research Institute,BHDC)
Address: Editorial Office of Drilling Fluid and Completion Fluid, Bohai Drilling Engineering Institute, Yanshan South Road, Renqiu City, Hebei Province