Dongfang 1-1 Gas Field Horizontal Well Sand Control Completion,

Sanding is a phenomenon that stratum sands come out with formation fluid. Sanding problem exists throughout the whole process of gas/oil well exploitation. Once sand flows in gas/oil well, pay zone will be buried by the sands, well bore will get blocked and ground pipeline will be abrasive erosional and wearied. In this way, sanding bring petroleum industries with economic loss as much as several billions per year. Besides, mass-sanding causes safety problems to oil/gas fields.The way of sand control completion is one of the most important measures generally used in ocean oil-gas field development.All these factors such as sand prevention method,sieve tube style selection,sand controlling result,oil and gas well off-take potential,oil and gas well longevity and cost of production are incident with one another as well as interaction.Ramping oil and gas well off-take potential and oil and gas field recovery factor and/or reduce the production costs are the prime objective of oil-gas field development.Especially economic and efficiently exploitation marginal oil field and/or middle smallness oil field are becoming more and more important.Sand control measures useful in offshore horizontal gas/oil wells are thoroughly studied. First, all sand control measures worldwide are investigated and collected. Then, reservoir conditions in which a method is pratical are compared, so does the sand control effect of each method. In the light of geological characteristics of Dongfang 1-1 Gas Field, mass indoor experiments are conducted and studied. Sand grain level are analyzed, the sand control parameters and screen pipe and blind pipe combination proportion is optimized. On this basis, the most suitable horizontal screen pipe sand control method for this gas field is found. Through the medium of DONGFANG 1—1 gas field 'field conduct proven, the sand control technology are completely run up to DONGFANG 1-1 gas field completion require.And the method worked well in the fields, which will surely provide guidance to similar gas/oil horizontal well sand control well completion.