In the middle and late stage of oilfield exploration development, difficulties such as land acquisition on surface, high density underground well pattern development cost are serious. Dense cluster Wells mainly way to mode transformation quality efficiency improvement. Combined with practice dense in Dagang Oilfield, paper detailed analyzes faced by design drilling engineering, which including ...

In the process of oilfield development, water injection is a very important work content, and reservoir exploitation quality, efficiency, are closely related. Oilfield technology has been widely applied popularized, but in specific application, it will also have some influence on oilfield, such as causing oil layer blockage. The author focus application well injection, analyze related reasons f...

The composition of oilfield water is complex and diverse. development application corrosion inhibitors can effectively inhibit the pipelines equipment by water. ions in produced Jidong Oilfield were determined instrumental analysis chemical analysis. Triazine prepared from ethanolamine formaldehyde as inhibitor was evaluated weight loss method. inhibition experiments carried out ancient samples...

Isatin, an extract from Strobilanthes cusia (Nees) Kuntze, was the base for synthesizing derivatives that were screened for antibacterial activity against oilfield water-borne bacteria. The bacterial groups are sulfate reducing, iron and total. The derivatives were characterized by spectrums and they showed good to moderate activity against sulfate reducing bacteria.

dezful embayment contains several potential source rocks deposited in tectonically active environments. existence of various source rocks with different geological ages makes this area one of the most prolific regions throughout the middle east. the pabdeh formation (lower paleocene-eocene), the gurpi formation (santonian-masstrichtian), the kazhdumi formation (albian) and the gadvan formation ...

Oil field is a very important non-renewable resource in China, which plays role economic strategy. In the process of oil development, water flooding technology can effectively improve production quality, provide strong technical support for our exploitation, and help to promote sustainable development enterprises. However, there are many influencing factors exploitation oilfield, so workers nee...

A random suffix search tree is a binary search tree constructed for the suffixes Xi = 0.BiBi+1Bi+2 . . . of a sequence B1, B2, B3., . . . of independent identically distributed random b-ary digits Bj . Let Dn denote the depth of the node for Xn in this tree when B1 is uniform on Zb. We show that for any value of b > 1, EDn = 2 log n + O(log log n), just as for the random binary search tree. We ...