The full-length paper compares the strengths;
weaknesses;
and limitations of fracture modeling;
production-data analysis (PDA);
pressure-transient analysis (PTA);
and numerical reservoir modeling in;
estimating effective fracture length and conductivity. The paper also evaluates how the complexities (in the hydraulic fracture) associated with non-Darcy flow;
multiphase flow;
and complex fracture geometries affect the results from the various techniques. The paper documents the significant differences in effective fracture length that;
in many cases;
can result from each technique. Copyright 2008 International Petroleum Technology Conference. Reproduced by permission;