稠油油藏水平井热采吸汽能力模型

目前在利用水平井进行稠油注蒸汽热采时，都认为蒸汽在注入过程中是均匀扩散到地层中的，简单的利用MaxLangenheim公式计算加热区面积。通过对地层的吸汽能力进行研究，得出了稠油油藏水平井热采的吸汽能力模型，该模型不仅考虑了热传递的影响，还考虑了蒸汽内能和摩擦损失能量的影响，并利用该模型开发了一套稠油油藏水平井热采分析软件(HHTS)。用所开发的软件对辽河油田冷42块油藏进行了计算，为稠油热采和水平井热采参数设计提供了理论参考依据。实际研究表明，蒸汽在注入过程中并不是均匀扩散到地层中，而是呈现某种数学分布，注汽速度与油藏参数、地层的吸汽能力和蒸汽的物性参数有关，即蒸汽的注入压力和注入流量并不是相互独立的变量，两者之间存在着一种数学关系。

A STEAM INJECTION MODEL FOR HORIZONTAL WELL IN HEAVY OIL RESERVOIR WITH THERMAL RECOVERY

It is thought that the steam diffuses uniformly into reservoirs in injection of horizontal well in heavy oil reservoir with thermal recovery, and the formula of MaxLangenheim is simply used to calculate the heating areas, but the study of the authors of the paper indicates that the steam diffused as some mathematical distribution, and the velocity of steam injection is in connection with reservoir parameters, the steam injection ability of formations and physical property parameters of steam, i.e, the injection pressure of steam has something to do with the injection fluid rate, there is a mathematical relationship between them. The authors study the steam injection ability, and set up a steam injection model for horizontal well in heavy oil with thermal recovery. The effect of heat exchange is consideres in the model, also the effect of steam intrinsic energy and friction loss. Then, a software (HHTS) is developed on the basis of this model, and the Leng 42 block of Liaohe oil field is calculated with the software, it can provide theoretical references for heavy oil with thermal recovery and horizontal well design parameters.