| The Sebei gas-field of Qinghai oil-field produces the dry-gas, however, under the well of the Sebei gas-field has much liquid loading. In virtue of the density and viscidity of water has much high compare to the dry-gas which is the density under the well is from 0.07g/cm~3 to 0.14g/cm~3,but the liquid loading response to the turbine flowmeter strongly. Accordingly the data surveyed by the flowmeter is comprehensive reflection of wellbore liquid loading and the gas flowing from producing gas layer. Therefore, For these information of liquid loading on the bottom of well producing gas section,it is the most important and the most tough problem currently that how to determine its fluid phase, the flowing pattern and the interpretation parameter,and establish the interpretation model accord with flowing status on the bottom of well.The paper is about the wellbore liquid loading effect to the measured well data and their explanation. The studying object of the text is the Sebei gas-field of Qinghai oil-field. The studying propose of the text is establish a set of liquid loading column emendation or interpret model. And the text also systemically study producing gas section of the liquid loading on the bottom of the well. The text is fall into three parts. In the first part the text discuss the theory basic knowledge about producing section of measured well, including the third,the fourth the fifth,and the sixth chapter in the text. The text discuss the two kinds of flowage form that is the gas and liquid, and analysis flowing pattern of the gas and liquid ,and expound the basic parameter about the two kinds of phase flowing. The text is begins to the high pressure physical property of the storage layer liquid, and it is set out to the basic measured well study theory. Meanwhile the text also introduces the interpretation model of measure well and flowing pattern identifying method which is used to the studying process, which is the basic theory in the whole studying work. The second part of the text we study interpretation method about no liquid loading on the bottom of well effect on the producing gas section combine with the practical data in the Sebei gas-field, including two parameter calculator: natural gas warp modulus and stratum volume modulus. The chapter seven of the text offer to the theory evidence about the liquid loading on the bottom of the well producing gas section interpretation model built. The third part we study the section interpretation method about the liquid loading on the bottom of well producing gas in Sebei gas-filed. According to the practical condition of Sebei gas-filed, combine with producing gas section measured well data and producing dynamic data, we study the liquid loading on the bottom of well effect on the producing gas section measured well data and the limit of actual interpretation model. We put forward the interpretation principle about the oil tube preference and hydrocarbon preference combine with mathematics and physics statistic analysis method. We established interpretative model of liquid loading on the bottom of well suit to Sebei gas-field. The model is used to many well data interpretation. The results of interpretation accord with practical producing.The paper put forward to a set of liquid loading column interpretation model, which is base on mathematics and physics method, which is suit to the liquid loading on the bottom of well producing gas section measured well data interpretation. The model is base on the volume model and locale producing practice. And the model is good appliance value. Meanwhile, the modelintroduces the gas compressibility coefficient C_g which is emendation of pressure andtemperature about density of light phase in wllbore. So the interpretation model eliminates the liquid loading effect to producing gas section measured well data. The interpretation model is value to spreading. |
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