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Yadong X.,Petrochina | Haibo C.,Petrochina | Yong F.,Petrochina | Jiang L.,Petrochina | Xuemei S.,Bohai Drilling and Exploration Co.
Well Testing | Year: 2010

Three new technologies of combed operation of multi-level pulse composite perforation and tests, super positive for perforation associated with test and the negative pressure opening perforation have been introduced and , a reasonable string structure is recommended , each characteristic is sum up. Its feasibility, stability and effectiveness are proved by field application. Source

Wang G.,Petrochina | Peng J.,Petrochina | Liu F.,Petrochina | Liu Y.,Petrochina | And 3 more authors.
Well Testing | Year: 2011

By full use of prominent features of the pressure derivative being more sensitive than the pressure itself, through statistical analysis for the start time of the transition section and the radial flow section of the double logarithmic curve of pressure and its derivative and by utilizing the main stage features of them, combining with reservoir static and dynamic parameters closely, the right conclusions are made, principles and conditions of selecting fractured layer to low permeability reservoir are proposed. Source

Zhao C.,Bohai Drilling and Exploration Co. | Wang G.,Bohai Drilling and Exploration Co. | Xu K.,Bohai Drilling and Exploration Co.
Drilling Fluid and Completion Fluid | Year: 2010

The Well Bin 29 × 1 is an exploration well, located in Dagang oil field, with a vertical depth of 4, 063 m. The bottom hole temperature is 132 °C while being static and 112 °C while circulating. Some difficulties were encountered as the severe after effect with the maximum channeling velocity 130 m/h and the whole hydrocarbon value 100%, and basalt formation was found at the bottom hole. To deal with these difficulties, emulsion triple-curing cement slurry, weighted thick spacer fluid and compound displacing technology were used in this well and the percent of high quality was 70%. Source

Fan X.,Bohai Drilling and Exploration Co. | Xia J.,Bohai Drilling and Exploration Co. | Wang F.,Bohai Drilling and Exploration Co.
Drilling Fluid and Completion Fluid | Year: 2010

For the high clay content and gypsum, hydration and swelling of formation is hard to be inhibited in Block Haian located in Zhejiang oilfield. Based on the analysis of the formations characteristics, the high inhibitive polysulfonate silicated fluorine film forming drilling fluid is developed to solve the down hole troubles, and the capabilities of anti-clay and salt-resisting have been enhanced, drilling difficulties including bit balling, reaming and sticking in the past have been overcome as well. Field application in 13 wells was very successful. Source

Yubin H.,Bohai Drilling and Exploration Co. | Yayong C.,Bohai Drilling and Exploration Co. | Zengxian H.,Bohai Drilling and Exploration Co. | Ru L.,Bohai Drilling and Exploration Co. | And 2 more authors.
Well Testing | Year: 2010

According to situation of down hole operation without drilling platform BOP , structure, principle and applied method of several BOP device is introduced in detail. Advantages and disadvantages of several blowout preventer device are analyzed by examples indicating the assembly C does not meet the on-site operation, and preventing method by multi-function devices BOP is recommended which has advantages of being convenient, safe and reliable, and saving time and labor. Source

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