A perf ball includes a first dissolvable component, an electronic racer and/or a matrix of tracer particles in a wellbore environment. The electronic tracer and at least some tracer particles in the matrix of tracer particles are releasable from the perf ball upon dissolution of the first dissolvable component in a wellbore environment. Some tracer particles in the matrix of tracer particles are dissolvable in oil. Some tracer particles in the matrix of tracer particles are dissolvable in aqueous medium. The electronic tracer can include a sensor and memory for recording properties of the wellbore environment, including any of pressure, temperature, fluid composition, or other environmental, physical, or chemical parameters.