西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (1): 83-87.DOI: 10.3863/j.issn.1674-5086.2011.01.014

• 石油与天然气工程 • Previous Articles     Next Articles

EXPERIMENTAL STUDY OF GASWATER LOGGING ANALYTICAL MODEL FOR ELONGATED BUBBLE FLOW IN HORIZONTAL WELL

LU Jing1，2 WU Xi-ling1，2   

  1. 1.College of Geosciences，China University of Petroleum，Changping Beijing 102249，China；2.State Key Laboratory of Petroleum Resource and Prospecting，China University of Petroleum，Changping Beijing 102249，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-02-20 Published:2011-02-20

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Abstract: Elongated bubble flow is one of the most common flow patterns occurring in gaswater flow in process of production logging in horizontal wells.In order to build an adequate logging analytical model for EB flow，experiments of gaswater flow are conducted on a transparent 16 meters long，inclinable test loop using air and tap water as test media.The experimental pipe inclination ranges from 75° to 90° (horizontal) and production logging toolstring measured inside the pipe while mixed fluids reach steadystate.By grasping the characteristics and mechanisms of EB flow during logging experiments，drift flux model is chosen to develop and modify a new model.The modified driftflux model verifies that experimental data obey the law of the new model.Distribution and drift velocity coefficients from experimental data reflect the influence on EB flow by production logging toolstring in horizontal or near horizontal borehole.The analytical model describes both mechanisms of EB flow and influences of measurement processing，so it is more adequate to interpret gaswater EB flow logging data in horizontal wells.

Key words: horizontal well, gas water two phase, elongated bubble flow, production logging, drift flux model, analytical model, experimental study

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